diff --git a/Octokit.Reactive/Clients/IObservableOrganizationMembersClient.cs b/Octokit.Reactive/Clients/IObservableOrganizationMembersClient.cs
index 8e5a903bc0..a327040aaa 100644
--- a/Octokit.Reactive/Clients/IObservableOrganizationMembersClient.cs
+++ b/Octokit.Reactive/Clients/IObservableOrganizationMembersClient.cs
@@ -304,6 +304,21 @@ public interface IObservableOrganizationMembersClient
         /// <returns></returns>
         IObservable<OrganizationMembership> AddOrUpdateOrganizationMembership(string org, string user, OrganizationMembershipUpdate addOrUpdateRequest);
 
+        /// <summary>
+        /// Create an organization invitation for a user
+        /// </summary>
+        /// <remarks>
+        /// This method requires authentication.
+        /// The authenticated user must be an organization owner.
+        /// See the <a href="https://developer.github.com/v3/orgs/members/#create-an-organization-invitation">API documentation</a>
+        /// for more information.
+        /// </remarks>
+        /// <param name="org">The login for the organization</param>
+        /// <param name="invitationRequest">An <see cref="OrganizationInvitationRequest"/> instance containing the
+        /// details of the organization invitation</param>
+        /// <returns></returns>
+        IObservable<OrganizationMembershipInvitation> CreateOrganizationInvitation(string org, OrganizationInvitationRequest invitationRequest);
+        
         /// <summary>
         /// Remove a user's membership with an organization.
         /// </summary>
diff --git a/Octokit.Reactive/Clients/ObservableOrganizationMembersClient.cs b/Octokit.Reactive/Clients/ObservableOrganizationMembersClient.cs
index e258722c26..31d41f23ba 100644
--- a/Octokit.Reactive/Clients/ObservableOrganizationMembersClient.cs
+++ b/Octokit.Reactive/Clients/ObservableOrganizationMembersClient.cs
@@ -418,6 +418,27 @@ public IObservable<OrganizationMembership> AddOrUpdateOrganizationMembership(str
 
             return _client.AddOrUpdateOrganizationMembership(org, user, addOrUpdateRequest).ToObservable();
         }
+        
+        /// <summary>
+        /// Create an organization invitation for a user
+        /// </summary>
+        /// <remarks>
+        /// This method requires authentication.
+        /// The authenticated user must be an organization owner.
+        /// See the <a href="https://developer.github.com/v3/orgs/members/#create-an-organization-invitation">API documentation</a>
+        /// for more information.
+        /// </remarks>
+        /// <param name="org">The login for the organization</param>
+        /// <param name="invitationRequest">An <see cref="OrganizationInvitationRequest"/> instance containing the
+        /// details of the organization invitation</param>
+        /// <returns></returns>
+        public IObservable<OrganizationMembershipInvitation> CreateOrganizationInvitation(string org, OrganizationInvitationRequest invitationRequest)
+        {
+            Ensure.ArgumentNotNullOrEmptyString(org, nameof(org));
+            Ensure.ArgumentNotNull(invitationRequest, nameof(invitationRequest));
+
+            return _client.CreateOrganizationInvitation(org, invitationRequest).ToObservable();
+        }
 
         /// <summary>
         /// Remove a user's membership with an organization.
diff --git a/Octokit.Tests.Integration/Clients/OrganizationMembersClientTests.cs b/Octokit.Tests.Integration/Clients/OrganizationMembersClientTests.cs
index d1fcb7f2c9..580d24fe09 100644
--- a/Octokit.Tests.Integration/Clients/OrganizationMembersClientTests.cs
+++ b/Octokit.Tests.Integration/Clients/OrganizationMembersClientTests.cs
@@ -1,5 +1,7 @@
-using System.Linq;
+using System;
+using System.Linq;
 using System.Threading.Tasks;
+using Octokit.Tests.Helpers;
 using Octokit.Tests.Integration.Helpers;
 using Xunit;
 
@@ -172,6 +174,95 @@ public async Task ReturnsUsersPendingAdminOrganizationMembership()
             }
         }
 
+        public class TheCreateOrganizationInvitationMethod
+        {
+            readonly IGitHubClient _gitHub;
+
+            public TheCreateOrganizationInvitationMethod()
+            {
+                _gitHub = Helper.GetAuthenticatedClient();
+            }
+
+            [OrganizationTest]
+            public async Task ReturnsOrganizationMembershipInvitationViaUserId()
+            {
+                var user = await _gitHub.User.Get("alfhenrik-test-2");
+                
+                var organizationInvitationRequest = new OrganizationInvitationRequest(user.Id);
+                var organizationMembershipInvitation = await _gitHub.Organization.Member.CreateOrganizationInvitation(Helper.Organization, organizationInvitationRequest);
+                
+                Assert.Equal("alfhenrik-test-2", organizationMembershipInvitation.Login);
+                Assert.Equal(OrganizationMembershipRole.DirectMember, organizationMembershipInvitation.Role.Value);
+                Assert.Equal(Helper.UserName, organizationMembershipInvitation.Inviter.Login);
+                
+                await _gitHub.Organization.Member.RemoveOrganizationMembership(Helper.Organization, "alfhenrik-test-2");
+            }
+            
+            [OrganizationTest]
+            public async Task ReturnsOrganizationMembershipInvitationViaUserEmail()
+            {
+                var email = RandomEmailGenerator.GenerateRandomEmail();
+                
+                var organizationInvitationRequest = new OrganizationInvitationRequest(email);
+                var organizationMembershipInvitation = await _gitHub.Organization.Member.CreateOrganizationInvitation(Helper.Organization, organizationInvitationRequest);
+                
+                Assert.Equal(email, organizationMembershipInvitation.Email);
+                Assert.Equal(OrganizationMembershipRole.DirectMember, organizationMembershipInvitation.Role.Value);
+                Assert.Equal(Helper.UserName, organizationMembershipInvitation.Inviter.Login);
+
+                await _gitHub.Organization.Member.CancelOrganizationInvitation(Helper.Organization, organizationMembershipInvitation.Id);
+            }
+
+            [OrganizationTest]
+            public async Task ThrowsApiValidationExceptionForCurrentOrganizationMembers()
+            {
+                var user = await _gitHub.User.Get(Helper.UserName);
+                var organizationInvitationRequest = new OrganizationInvitationRequest(user.Id);
+                
+                await Assert.ThrowsAsync<ApiValidationException>(() => _gitHub.Organization.Member.CreateOrganizationInvitation(Helper.Organization, organizationInvitationRequest));
+            }
+
+            [OrganizationTest]
+            public async Task ReturnsOrganizationMembershipInvitationSingleTeam()
+            {
+                var user = await _gitHub.User.Get("alfhenrik-test-2");
+
+                var team1 = await _gitHub.Organization.Team.Create(Helper.Organization, new NewTeam("TestTeam1"));
+                
+                var organizationInvitationRequest = new OrganizationInvitationRequest(user.Id, new int[] {team1.Id});
+                var organizationMembershipInvitation = await _gitHub.Organization.Member.CreateOrganizationInvitation(Helper.Organization, organizationInvitationRequest);
+                
+                Assert.Equal("alfhenrik-test-2", organizationMembershipInvitation.Login);
+                Assert.Equal(OrganizationMembershipRole.DirectMember, organizationMembershipInvitation.Role.Value);
+                Assert.Equal(Helper.UserName, organizationMembershipInvitation.Inviter.Login);
+                Assert.Equal(1, organizationMembershipInvitation.TeamCount);
+                
+                await _gitHub.Organization.Team.Delete(Helper.Organization, team1.Slug);
+                await _gitHub.Organization.Member.RemoveOrganizationMembership(Helper.Organization, "alfhenrik-test-2");
+            }
+            
+            [OrganizationTest]
+            public async Task ReturnsOrganizationMembershipInvitationMultipleTeams()
+            {
+                var user = await _gitHub.User.Get("alfhenrik-test-2");
+
+                var team1 = await _gitHub.Organization.Team.Create(Helper.Organization, new NewTeam("TestTeam1"));
+                var team2 = await _gitHub.Organization.Team.Create(Helper.Organization, new NewTeam("TestTeam2"));
+                
+                var organizationInvitationRequest = new OrganizationInvitationRequest(user.Id, new int[] {team1.Id, team2.Id});
+                var organizationMembershipInvitation = await _gitHub.Organization.Member.CreateOrganizationInvitation(Helper.Organization, organizationInvitationRequest);
+                
+                Assert.Equal("alfhenrik-test-2", organizationMembershipInvitation.Login);
+                Assert.Equal(OrganizationMembershipRole.DirectMember, organizationMembershipInvitation.Role.Value);
+                Assert.Equal(Helper.UserName, organizationMembershipInvitation.Inviter.Login);
+                Assert.Equal(2, organizationMembershipInvitation.TeamCount);
+                
+                await _gitHub.Organization.Team.Delete(Helper.Organization, team1.Slug);
+                await _gitHub.Organization.Team.Delete(Helper.Organization, team2.Slug);
+                await _gitHub.Organization.Member.RemoveOrganizationMembership(Helper.Organization, "alfhenrik-test-2");
+            }
+        }
+
         public class TheRemoveOrganizationMembershipMethod
         {
             readonly IGitHubClient _gitHub;
diff --git a/Octokit.Tests.Integration/Reactive/ObservableOrganizationMembersClientTests.cs b/Octokit.Tests.Integration/Reactive/ObservableOrganizationMembersClientTests.cs
index 6095584ba3..aed9bcf5b7 100644
--- a/Octokit.Tests.Integration/Reactive/ObservableOrganizationMembersClientTests.cs
+++ b/Octokit.Tests.Integration/Reactive/ObservableOrganizationMembersClientTests.cs
@@ -1,7 +1,9 @@
-using System.Reactive.Linq;
+using System;
+using System.Reactive.Linq;
 using System.Reactive.Threading.Tasks;
 using System.Threading.Tasks;
 using Octokit.Reactive;
+using Octokit.Tests.Helpers;
 using Octokit.Tests.Integration.Helpers;
 using Xunit;
 
@@ -62,6 +64,97 @@ public async Task ReturnsUsersPendingAdminOrganizationMembership()
                 await _client.RemoveOrganizationMembership(Helper.Organization, "alfhenrik-test-2");
             }
         }
+        
+        public class TheCreateOrganizationInvitationMethod
+        {
+            readonly IGitHubClient _gitHub;
+            readonly ObservableOrganizationMembersClient _client;
+
+            public TheCreateOrganizationInvitationMethod()
+            {
+                _gitHub = Helper.GetAuthenticatedClient();
+                _client = new ObservableOrganizationMembersClient(_gitHub);
+            }
+
+            [OrganizationTest]
+            public async Task ReturnsOrganizationMembershipInvitationViaUserId()
+            {
+                var user = await _gitHub.User.Get("alfhenrik-test-2");
+                
+                var organizationInvitationRequest = new OrganizationInvitationRequest(user.Id);
+                var organizationMembershipInvitation = await _client.CreateOrganizationInvitation(Helper.Organization, organizationInvitationRequest);
+                
+                Assert.Equal("alfhenrik-test-2", organizationMembershipInvitation.Login);
+                Assert.Equal(OrganizationMembershipRole.DirectMember, organizationMembershipInvitation.Role.Value);
+                Assert.Equal(Helper.UserName, organizationMembershipInvitation.Inviter.Login);
+                
+                await _client.RemoveOrganizationMembership(Helper.Organization, "alfhenrik-test-2");
+            }
+            
+            [OrganizationTest]
+            public async Task ReturnsOrganizationMembershipInvitationViaUserEmail()
+            {
+                var email = RandomEmailGenerator.GenerateRandomEmail();
+                
+                var organizationInvitationRequest = new OrganizationInvitationRequest(email);
+                var organizationMembershipInvitation = await _client.CreateOrganizationInvitation(Helper.Organization, organizationInvitationRequest);
+                
+                Assert.Equal(email, organizationMembershipInvitation.Email);
+                Assert.Equal(OrganizationMembershipRole.DirectMember, organizationMembershipInvitation.Role.Value);
+                Assert.Equal(Helper.UserName, organizationMembershipInvitation.Inviter.Login);
+
+                await _client.CancelOrganizationInvitation(Helper.Organization, organizationMembershipInvitation.Id);
+            }
+
+            [OrganizationTest]
+            public async Task ThrowsApiValidationExceptionForCurrentOrganizationMembers()
+            {
+                var user = await _gitHub.User.Get(Helper.UserName);
+                var organizationInvitationRequest = new OrganizationInvitationRequest(user.Id);
+                
+                await Assert.ThrowsAsync<ApiValidationException>(() => _client.CreateOrganizationInvitation(Helper.Organization, organizationInvitationRequest).ToTask());
+            }
+
+            [OrganizationTest]
+            public async Task ReturnsOrganizationMembershipInvitationSingleTeam()
+            {
+                var user = await _gitHub.User.Get("alfhenrik-test-2");
+
+                var team1 = await _gitHub.Organization.Team.Create(Helper.Organization, new NewTeam("TestTeam1"));
+                
+                var organizationInvitationRequest = new OrganizationInvitationRequest(user.Id, new int[] {team1.Id});
+                var organizationMembershipInvitation = await _client.CreateOrganizationInvitation(Helper.Organization, organizationInvitationRequest);
+                
+                Assert.Equal("alfhenrik-test-2", organizationMembershipInvitation.Login);
+                Assert.Equal(OrganizationMembershipRole.DirectMember, organizationMembershipInvitation.Role.Value);
+                Assert.Equal(Helper.UserName, organizationMembershipInvitation.Inviter.Login);
+                Assert.Equal(1, organizationMembershipInvitation.TeamCount);
+                
+                await _gitHub.Organization.Team.Delete(Helper.Organization, team1.Slug);
+                await _client.RemoveOrganizationMembership(Helper.Organization, "alfhenrik-test-2");
+            }
+            
+            [OrganizationTest]
+            public async Task ReturnsOrganizationMembershipInvitationMultipleTeams()
+            {
+                var user = await _gitHub.User.Get("alfhenrik-test-2");
+
+                var team1 = await _gitHub.Organization.Team.Create(Helper.Organization, new NewTeam("TestTeam1"));
+                var team2 = await _gitHub.Organization.Team.Create(Helper.Organization, new NewTeam("TestTeam2"));
+                
+                var organizationInvitationRequest = new OrganizationInvitationRequest(user.Id, new int[] {team1.Id, team2.Id});
+                var organizationMembershipInvitation = await _client.CreateOrganizationInvitation(Helper.Organization, organizationInvitationRequest);
+                
+                Assert.Equal("alfhenrik-test-2", organizationMembershipInvitation.Login);
+                Assert.Equal(OrganizationMembershipRole.DirectMember, organizationMembershipInvitation.Role.Value);
+                Assert.Equal(Helper.UserName, organizationMembershipInvitation.Inviter.Login);
+                Assert.Equal(2, organizationMembershipInvitation.TeamCount);
+                
+                await _gitHub.Organization.Team.Delete(Helper.Organization, team1.Slug);
+                await _gitHub.Organization.Team.Delete(Helper.Organization, team2.Slug);
+                await _client.RemoveOrganizationMembership(Helper.Organization, "alfhenrik-test-2");
+            }
+        }
 
         public class TheRemoveOrganizationMembershipMethod
         {
diff --git a/Octokit.Tests/Clients/OrganizationMembersClientTests.cs b/Octokit.Tests/Clients/OrganizationMembersClientTests.cs
index d09ed836aa..838cca8644 100644
--- a/Octokit.Tests/Clients/OrganizationMembersClientTests.cs
+++ b/Octokit.Tests/Clients/OrganizationMembersClientTests.cs
@@ -2,6 +2,7 @@
 using System.Net;
 using System.Threading.Tasks;
 using NSubstitute;
+using NSubstitute.Core.DependencyInjection;
 using Octokit.Internal;
 using Xunit;
 
@@ -562,6 +563,33 @@ public async Task EnsureNonNullArguments()
             }
         }
 
+        public class TheCreateOrganizationInvitationMethod
+        {
+            [Fact]
+            public void PostsToTheCorrectUrl()
+            {
+                var organizationInvitationRequest = new OrganizationInvitationRequest("email");
+
+                var connection = Substitute.For<IApiConnection>();
+                var client = new OrganizationMembersClient(connection);
+
+                client.CreateOrganizationInvitation("org", organizationInvitationRequest);
+                
+                connection.Received().Post<OrganizationMembershipInvitation>(Arg.Is<Uri>(u => u.ToString() == "orgs/org/invitations"), Arg.Any<object>());
+            }
+
+            [Fact]
+            public async Task EnsureNonNullArguments()
+            {
+                var organizationInvitationRequest = new OrganizationInvitationRequest("email");
+                var client = new OrganizationMembersClient(Substitute.For<IApiConnection>());
+                
+                await Assert.ThrowsAsync<ArgumentNullException>(() => client.CreateOrganizationInvitation(null, organizationInvitationRequest));
+                await Assert.ThrowsAsync<ArgumentException>(() => client.CreateOrganizationInvitation("", organizationInvitationRequest));
+                await Assert.ThrowsAsync<ArgumentNullException>(() => client.CreateOrganizationInvitation("org", null));
+            }
+        }
+
         public class TheDeleteOrganizationMembershipMethod
         {
             [Fact]
diff --git a/Octokit.Tests/Helpers/RandomEmailGenerator.cs b/Octokit.Tests/Helpers/RandomEmailGenerator.cs
new file mode 100644
index 0000000000..c5399fb0e3
--- /dev/null
+++ b/Octokit.Tests/Helpers/RandomEmailGenerator.cs
@@ -0,0 +1,15 @@
+using System;
+
+namespace Octokit.Tests.Helpers
+{
+    public static class RandomEmailGenerator
+    {
+        public static string GenerateRandomEmail()
+        {
+            var randomUsername = Guid.NewGuid().ToString();
+            var randomDomain = Guid.NewGuid().ToString();
+            
+            return $"{randomUsername}@{randomDomain}.com";
+        }
+    }
+}
\ No newline at end of file
diff --git a/Octokit.Tests/Models/OrganizationInvitationRequestTests.cs b/Octokit.Tests/Models/OrganizationInvitationRequestTests.cs
new file mode 100644
index 0000000000..fe4da95ffe
--- /dev/null
+++ b/Octokit.Tests/Models/OrganizationInvitationRequestTests.cs
@@ -0,0 +1,35 @@
+using System.Threading.Tasks;
+using Xunit;
+
+namespace Octokit.Tests.Models
+{
+    public class OrganizationInvitationRequestTests
+    {
+        public class TheConstructor
+        {
+            [Fact]
+            public void CreatesOrganizationInvitationRequestByUserId()
+            {
+                const int userId = 1;
+                var organizationInvitationRequest = new OrganizationInvitationRequest(userId);
+
+                Assert.Equal(userId, organizationInvitationRequest.InviteeId);
+                Assert.Equal(OrganizationMembershipRole.DirectMember, organizationInvitationRequest.Role);
+                Assert.Null(organizationInvitationRequest.Email);
+                Assert.Null(organizationInvitationRequest.TeamIds);
+            }
+
+            [Fact]
+            public async Task CreatesOrganizationInvitationRequestByUserEmail()
+            {
+                const string email = "testemail";
+                var organizationInvitationRequest = new OrganizationInvitationRequest(email);
+
+                Assert.Equal(email, organizationInvitationRequest.Email);
+                Assert.Equal(OrganizationMembershipRole.DirectMember, organizationInvitationRequest.Role);
+                Assert.Null(organizationInvitationRequest.InviteeId);
+                Assert.Null(organizationInvitationRequest.TeamIds);
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/Octokit.Tests/Reactive/ObservableOrganizationMembersClientTests.cs b/Octokit.Tests/Reactive/ObservableOrganizationMembersClientTests.cs
index 6e3e44b435..1a03d209d1 100644
--- a/Octokit.Tests/Reactive/ObservableOrganizationMembersClientTests.cs
+++ b/Octokit.Tests/Reactive/ObservableOrganizationMembersClientTests.cs
@@ -361,6 +361,33 @@ public async Task EnsuresNonNullArguments()
                 await Assert.ThrowsAsync<ArgumentNullException>(() => client.AddOrUpdateOrganizationMembership("org", "username", null).ToTask());
             }
         }
+        
+        public class TheCreateOrganizationInvitationMethod
+        {
+            [Fact]
+            public void CreateOrganizationInvitationFromClientOrganizationMember()
+            {
+                var gitHubClient = Substitute.For<IGitHubClient>();
+                var client = new ObservableOrganizationMembersClient(gitHubClient);
+
+                var organizationInvitationRequest = new OrganizationInvitationRequest(1);
+                client.CreateOrganizationInvitation("org", organizationInvitationRequest);
+
+                gitHubClient.Organization.Member.Received().CreateOrganizationInvitation("org", organizationInvitationRequest);
+            }
+
+            [Fact]
+            public async Task EnsureNonNullArguments()
+            {
+                var client = new ObservableOrganizationMembersClient(Substitute.For<IGitHubClient>());
+                
+                var organizationInvitationRequest = new OrganizationInvitationRequest(1);
+                
+                await Assert.ThrowsAsync<ArgumentNullException>(() => client.CreateOrganizationInvitation(null, organizationInvitationRequest).ToTask());
+                await Assert.ThrowsAsync<ArgumentException>(() => client.CreateOrganizationInvitation("", organizationInvitationRequest).ToTask());
+                await Assert.ThrowsAsync<ArgumentNullException>(() => client.CreateOrganizationInvitation("org", null).ToTask());
+            }
+        }
 
         public class TheDeleteOrganizationMembershipMethod
         {
diff --git a/Octokit/Clients/IOrganizationMembersClient.cs b/Octokit/Clients/IOrganizationMembersClient.cs
index c16707f9d6..1a71af028f 100644
--- a/Octokit/Clients/IOrganizationMembersClient.cs
+++ b/Octokit/Clients/IOrganizationMembersClient.cs
@@ -310,6 +310,21 @@ public interface IOrganizationMembersClient
         /// <returns></returns>
         Task<OrganizationMembership> AddOrUpdateOrganizationMembership(string org, string user, OrganizationMembershipUpdate addOrUpdateRequest);
 
+        /// <summary>
+        /// Create an organization invitation for a user
+        /// </summary>
+        /// <remarks>
+        /// This method requires authentication.
+        /// The authenticated user must be an organization owner.
+        /// See the <a href="https://developer.github.com/v3/orgs/members/#create-an-organization-invitation">API documentation</a>
+        /// for more information.
+        /// </remarks>
+        /// <param name="org">The login for the organization</param>
+        /// <param name="invitationRequest">An <see cref="OrganizationInvitationRequest"/> instance containing the
+        /// details of the organization invitation</param>
+        /// <returns></returns>
+        Task<OrganizationMembershipInvitation> CreateOrganizationInvitation(string org, OrganizationInvitationRequest invitationRequest);
+
         /// <summary>
         /// Remove a user's membership with an organization.
         /// </summary>
diff --git a/Octokit/Clients/OrganizationMembersClient.cs b/Octokit/Clients/OrganizationMembersClient.cs
index b5fd87de78..038d821be4 100644
--- a/Octokit/Clients/OrganizationMembersClient.cs
+++ b/Octokit/Clients/OrganizationMembersClient.cs
@@ -511,6 +511,28 @@ public Task<OrganizationMembership> AddOrUpdateOrganizationMembership(string org
             return ApiConnection.Put<OrganizationMembership>(ApiUrls.OrganizationMemberships(org, user), addOrUpdateRequest);
         }
 
+        /// <summary>
+        /// Create an organization invitation for a user
+        /// </summary>
+        /// <remarks>
+        /// This method requires authentication.
+        /// The authenticated user must be an organization owner.
+        /// See the <a href="https://developer.github.com/v3/orgs/members/#create-an-organization-invitation">API documentation</a>
+        /// for more information.
+        /// </remarks>
+        /// <param name="org">The login for the organization</param>
+        /// <param name="invitationRequest">An <see cref="OrganizationInvitationRequest"/> instance containing the
+        /// details of the organization invitation</param>
+        /// <returns></returns>
+        [ManualRoute("POST", "/orgs/{org}/invitations")]
+        public Task<OrganizationMembershipInvitation> CreateOrganizationInvitation(string org, OrganizationInvitationRequest invitationRequest)
+        {
+            Ensure.ArgumentNotNullOrEmptyString(org, nameof(org));
+            Ensure.ArgumentNotNull(invitationRequest, nameof(invitationRequest));
+
+            return ApiConnection.Post<OrganizationMembershipInvitation>(ApiUrls.OrganizationInvitations(org), invitationRequest);
+        }
+
         /// <summary>
         /// Remove a user's membership with an organization.
         /// </summary>
diff --git a/Octokit/Helpers/ApiUrls.cs b/Octokit/Helpers/ApiUrls.cs
index 50b8e1a0e9..7c8ecc27ed 100644
--- a/Octokit/Helpers/ApiUrls.cs
+++ b/Octokit/Helpers/ApiUrls.cs
@@ -922,6 +922,16 @@ public static Uri OrganizationMemberships(string org, string name)
         {
             return "orgs/{0}/memberships/{1}".FormatUri(org, name);
         }
+        
+        /// <summary>
+        /// Returns the <see cref="Uri"/> for the organization's invitations
+        /// </summary>
+        /// <param name="org">The name of the organization</param>
+        /// <returns></returns>
+        public static Uri OrganizationInvitations(string org)
+        {
+            return "orgs/{0}/invitations".FormatUri(org);
+        }
 
         /// <summary>
         /// Returns the <see cref="Uri"/> for the organizations pending invitations
diff --git a/Octokit/Models/Request/OrganizationInvitationRequest.cs b/Octokit/Models/Request/OrganizationInvitationRequest.cs
new file mode 100644
index 0000000000..0db963146d
--- /dev/null
+++ b/Octokit/Models/Request/OrganizationInvitationRequest.cs
@@ -0,0 +1,87 @@
+using System.Diagnostics;
+using System.Globalization;
+using Octokit.Internal;
+
+namespace Octokit
+{
+    /// <summary>
+    /// Used as part of the request to invite a user to an organization.
+    /// </summary>
+    [DebuggerDisplay("{DebuggerDisplay,nq}")]
+    public class OrganizationInvitationRequest
+    {
+        public OrganizationInvitationRequest(int inviteeId)
+        {
+            InviteeId = inviteeId;
+        }
+        
+        public OrganizationInvitationRequest(string email)
+        {
+            Email = email;
+        }
+        
+        public OrganizationInvitationRequest(int inviteeId, OrganizationMembershipRole role)
+        {
+            InviteeId = inviteeId;
+            Role = role;
+        }
+        
+        public OrganizationInvitationRequest(string email, OrganizationMembershipRole role)
+        {
+            Email = email;
+            Role = role;
+        }
+        
+        public OrganizationInvitationRequest(int inviteeId, int[] teamIds)
+        {
+            InviteeId = inviteeId;
+            TeamIds = teamIds;
+        }
+        
+        public OrganizationInvitationRequest(string email, int[] teamIds)
+        {
+            Email = email;
+            TeamIds = teamIds;
+        }
+        
+        public OrganizationInvitationRequest(int inviteeId, OrganizationMembershipRole role, int[] teamIds)
+        {
+            InviteeId = inviteeId;
+            Role = role;
+            TeamIds = teamIds;
+        }
+        
+        public OrganizationInvitationRequest(string email, OrganizationMembershipRole role, int[] teamIds)
+        {
+            Email = email;
+            Role = role;
+            TeamIds = teamIds;
+        }
+        
+        /// <summary>
+        /// The user ID of the person being invited. Required if Email is not specified.
+        /// </summary>
+        [Parameter(Key = "invitee_id")]
+        public int? InviteeId { get; set; }
+        
+        /// <summary>
+        /// The email address of the person being invited. Required if InviteeId is not specified.
+        /// </summary>
+        [Parameter(Key = "email")]
+        public string Email { get; set; }
+
+        /// <summary>
+        /// The role to give the user in the organization. The default is <see cref="OrganizationMembershipRole.DirectMember"/>.
+        /// </summary>
+        [Parameter(Key = "role")]
+        public OrganizationMembershipRole Role { get; set; } = OrganizationMembershipRole.DirectMember;
+        
+        /// <summary>
+        /// The IDs for the team(s) to invite new members to
+        /// </summary>
+        [Parameter(Key = "team_ids")]
+        public int[] TeamIds { get; set; }
+
+        internal string DebuggerDisplay => $"InviteeId: {InviteeId}; Email: {Email}; Role: {Role}; Team IDs: {(TeamIds != null ? string.Join(", ", TeamIds) : "")}";
+    }
+}
diff --git a/Octokit/Models/Response/OrganizationMembershipInvitation.cs b/Octokit/Models/Response/OrganizationMembershipInvitation.cs
index 3a22389fdd..da2ebc35a3 100644
--- a/Octokit/Models/Response/OrganizationMembershipInvitation.cs
+++ b/Octokit/Models/Response/OrganizationMembershipInvitation.cs
@@ -12,7 +12,7 @@ public OrganizationMembershipInvitation()
         {
         }
 
-        public OrganizationMembershipInvitation(int id, string nodeId, string login, string email, OrganizationMembershipRole role, DateTimeOffset createdAt, User inviter)
+        public OrganizationMembershipInvitation(int id, string nodeId, string login, string email, OrganizationMembershipRole role, DateTimeOffset createdAt, User inviter, int teamCount)
         {
             Id = id;
             NodeId = nodeId;
@@ -21,6 +21,7 @@ public OrganizationMembershipInvitation(int id, string nodeId, string login, str
             Role = role;
             CreatedAt = createdAt;
             Inviter = inviter;
+            TeamCount = teamCount;
         }
 
         public int Id { get; private set; }
@@ -35,6 +36,7 @@ public OrganizationMembershipInvitation(int id, string nodeId, string login, str
         public StringEnum<OrganizationMembershipRole> Role { get; private set; }
         public DateTimeOffset CreatedAt { get; private set; }
         public User Inviter { get; private set; }
+        public int TeamCount { get; private set; }
 
         [SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode",
             Justification = "Used by DebuggerDisplayAttribute")]