diff --git a/docs/angular/cli/run-many.md b/docs/angular/cli/run-many.md
index 0a247289e0d7f8..6a6df3e8ebb1a6 100644
--- a/docs/angular/cli/run-many.md
+++ b/docs/angular/cli/run-many.md
@@ -36,6 +36,12 @@ Build proj1 and proj2 and all their dependencies.:
 nx run-many --target=test --projects=proj1,proj2 --with-deps
 ```
 
+Test all projects that are tagged with foo or bar.:
+
+```bash
+nx run-many --target=test --tags=foo,bar
+```
+
 ## Options
 
 ### all
@@ -78,6 +84,10 @@ Default: `false`
 
 Rerun the tasks even when the results are available in the cache
 
+### tags
+
+Run projects having any of the given tags (comma delimited)
+
 ### target
 
 Task to run for affected projects
diff --git a/docs/node/cli/run-many.md b/docs/node/cli/run-many.md
index 0a247289e0d7f8..6a6df3e8ebb1a6 100644
--- a/docs/node/cli/run-many.md
+++ b/docs/node/cli/run-many.md
@@ -36,6 +36,12 @@ Build proj1 and proj2 and all their dependencies.:
 nx run-many --target=test --projects=proj1,proj2 --with-deps
 ```
 
+Test all projects that are tagged with foo or bar.:
+
+```bash
+nx run-many --target=test --tags=foo,bar
+```
+
 ## Options
 
 ### all
@@ -78,6 +84,10 @@ Default: `false`
 
 Rerun the tasks even when the results are available in the cache
 
+### tags
+
+Run projects having any of the given tags (comma delimited)
+
 ### target
 
 Task to run for affected projects
diff --git a/docs/react/cli/run-many.md b/docs/react/cli/run-many.md
index 0a247289e0d7f8..6a6df3e8ebb1a6 100644
--- a/docs/react/cli/run-many.md
+++ b/docs/react/cli/run-many.md
@@ -36,6 +36,12 @@ Build proj1 and proj2 and all their dependencies.:
 nx run-many --target=test --projects=proj1,proj2 --with-deps
 ```
 
+Test all projects that are tagged with foo or bar.:
+
+```bash
+nx run-many --target=test --tags=foo,bar
+```
+
 ## Options
 
 ### all
@@ -78,6 +84,10 @@ Default: `false`
 
 Rerun the tasks even when the results are available in the cache
 
+### tags
+
+Run projects having any of the given tags (comma delimited)
+
 ### target
 
 Task to run for affected projects
diff --git a/e2e/workspace/src/workspace.test.ts b/e2e/workspace/src/workspace.test.ts
index b85ced6c1688ef..fb669c83146684 100644
--- a/e2e/workspace/src/workspace.test.ts
+++ b/e2e/workspace/src/workspace.test.ts
@@ -80,6 +80,7 @@ describe('run-many', () => {
       const libB = uniq('libb-rand');
       const libC = uniq('libc-rand');
       const libD = uniq('libd-rand');
+      const tagA = uniq('taga-rand');
 
       runCLI(`generate @nrwl/angular:app ${appA}`);
       runCLI(`generate @nrwl/angular:lib ${libA} --buildable --defaults`);
@@ -87,6 +88,12 @@ describe('run-many', () => {
       runCLI(`generate @nrwl/angular:lib ${libC} --buildable --defaults`);
       runCLI(`generate @nrwl/angular:lib ${libD} --defaults`);
 
+      // Add tagA to libA and libB
+      const nxJson: NxJson = readJson('nx.json');
+      nxJson.projects[libA].tags = [tagA];
+      nxJson.projects[libB].tags = [tagA];
+      updateFile('nx.json', JSON.stringify(nxJson));
+
       // libA depends on libC
       updateFile(
         `libs/${libA}/src/lib/${libA}.module.spec.ts`,
@@ -111,6 +118,15 @@ describe('run-many', () => {
       expect(buildParallel).not.toContain(`- ${libD}`);
       expect(buildParallel).toContain('Running target "build" succeeded');
 
+      // testing run many tags starting
+      const buildTags = runCLI(`run-many --target=build --tags="${tagA}"`);
+      expect(buildTags).toContain(`Running target build for projects:`);
+      expect(buildTags).toContain(`- ${libA}`);
+      expect(buildTags).toContain(`- ${libB}`);
+      expect(buildTags).not.toContain(`- ${libC}`);
+      expect(buildTags).not.toContain(`- ${libD}`);
+      expect(buildTags).toContain('Running target "build" succeeded');
+
       // testing run many --all starting
       const buildAllParallel = runCLI(`run-many --target=build --all`);
       expect(buildAllParallel).toContain(`Running target build for projects:`);
diff --git a/packages/workspace/src/command-line/nx-commands.ts b/packages/workspace/src/command-line/nx-commands.ts
index 80375f39f63a2f..a3f819959aabf3 100644
--- a/packages/workspace/src/command-line/nx-commands.ts
+++ b/packages/workspace/src/command-line/nx-commands.ts
@@ -320,15 +320,23 @@ function withRunManyOptions(yargs: yargs.Argv): yargs.Argv {
       describe: 'Projects to run (comma delimited)',
       type: 'string',
     })
+    .option('tags', {
+      describe: 'Run projects having any of the given tags (comma delimited)',
+      type: 'string',
+    })
     .option('all', {
       describe: 'Run the target on all projects in the workspace',
       type: 'boolean',
       default: undefined,
     })
-    .check(({ all, projects }) => {
-      if ((all && projects) || (!all && !projects))
-        throw new Error('You must provide either --all or --projects');
-      return true;
+    .check(({ all, projects, tags }) => {
+      const suppliedArgs = +!!all + +!!projects + +!!tags;
+      if (suppliedArgs === 1) {
+        return true;
+      }
+      throw new Error(
+        'You must provide either --all or --projects or --tags'
+      );
     })
     .options('runner', {
       describe: 'Override the tasks runner in `nx.json`',
diff --git a/packages/workspace/src/command-line/run-many.ts b/packages/workspace/src/command-line/run-many.ts
index 8da2081f1cab55..aa269ee7de2d15 100644
--- a/packages/workspace/src/command-line/run-many.ts
+++ b/packages/workspace/src/command-line/run-many.ts
@@ -8,7 +8,7 @@ import {
   ProjectGraphNode,
   withDeps,
 } from '../core/project-graph';
-import { readEnvironment } from '../core/file-utils';
+import { readEnvironment, readNxJson } from '../core/file-utils';
 import { DefaultReporter } from '../tasks-runner/default-reporter';
 import { projectHasTarget } from '../utilities/project-graph-utils';
 import { output } from '../utilities/output';
@@ -43,14 +43,28 @@ export async function runMany(parsedArgs: yargs.Arguments) {
   );
 }
 
+function selectProjectsFromTags(tags: string[]): string[] {
+  let nxJson = readNxJson();
+  return Object.entries(nxJson.projects)
+    .filter(([name, project]) => {
+      let projectTags = project.tags || [];
+      return tags.some((tag) => projectTags.includes(tag));
+    })
+    .map(([name]) => name);
+}
+
 function projectsToRun(nxArgs: NxArgs, projectGraph: ProjectGraph) {
   const allProjects = Object.values(projectGraph.nodes);
   if (nxArgs.all) {
     return runnableForTarget(allProjects, nxArgs.target);
   } else {
+    let projects = nxArgs.projects;
+    if (projects.length === 0) {
+      projects = selectProjectsFromTags(nxArgs.tags);
+    }
     checkForInvalidProjects(nxArgs, allProjects);
     let selectedProjects = allProjects.filter(
-      (p) => nxArgs.projects.indexOf(p.name) > -1
+      (p) => projects.indexOf(p.name) > -1
     );
     if (nxArgs.withDeps) {
       selectedProjects = Object.values(
diff --git a/packages/workspace/src/command-line/utils.ts b/packages/workspace/src/command-line/utils.ts
index 08c3c38a5593fa..cd29762c010eba 100644
--- a/packages/workspace/src/command-line/utils.ts
+++ b/packages/workspace/src/command-line/utils.ts
@@ -21,7 +21,7 @@ const runOne = [
   'scan',
 ];
 
-const runMany = [...runOne, 'projects', 'quiet', 'all', 'verbose'];
+const runMany = [...runOne, 'projects', 'tags', 'quiet', 'all', 'verbose'];
 
 const runAffected = [
   ...runOne,
@@ -65,6 +65,7 @@ export interface NxArgs {
   withDeps?: boolean;
   'with-deps'?: boolean;
   projects?: string[];
+  tags?: string[];
   select?: string;
   skipNxCache?: boolean;
   'skip-nx-cache'?: boolean;
@@ -102,6 +103,13 @@ export function splitArgsIntoNxArgsAndOverrides(
         .split(',')
         .map((p: string) => p.trim());
     }
+    if (!nxArgs.tags) {
+      nxArgs.tags = [];
+    } else {
+      nxArgs.tags = (args.tags as string)
+        .split(',')
+        .map((p: string) => p.trim());
+    }
   }
 
   if (nxArgs.prod) {
diff --git a/scripts/documentation/generate-cli-data.ts b/scripts/documentation/generate-cli-data.ts
index 49c4b27a9833b5..609816c4ddeff6 100644
--- a/scripts/documentation/generate-cli-data.ts
+++ b/scripts/documentation/generate-cli-data.ts
@@ -348,6 +348,10 @@ const examples = {
       command: 'run-many --target=test --projects=proj1,proj2 --with-deps',
       description: 'Build proj1 and proj2 and all their dependencies.',
     },
+    {
+      command: 'run-many --target=test --tags=foo,bar',
+      description: 'Test all projects that are tagged with foo or bar.',
+    },
   ],
   migrate: [
     {