diff --git a/.changelog/10693.txt b/.changelog/10693.txt
new file mode 100644
index 00000000000..842c2df5ca0
--- /dev/null
+++ b/.changelog/10693.txt
@@ -0,0 +1,3 @@
+```release-note:enhancement
+resource/aws_lb: Update `name` and `name_prefix` plan-time validation to exclude `"internal-"`
+```
diff --git a/internal/service/elbv2/validate.go b/internal/service/elbv2/validate.go
index 718f76a7118..a8923d4645a 100644
--- a/internal/service/elbv2/validate.go
+++ b/internal/service/elbv2/validate.go
@@ -29,6 +29,10 @@ func validName(v interface{}, k string) (ws []string, errors []error) {
 		errors = append(errors, fmt.Errorf(
 			"%q cannot end with a hyphen: %q", k, value))
 	}
+	if regexp.MustCompile(`^internal-`).MatchString(value) {
+		errors = append(errors, fmt.Errorf(
+			`%q cannot begin with "internal-": %q`, k, value))
+	}
 	return
 }
 
@@ -47,6 +51,10 @@ func validNamePrefix(v interface{}, k string) (ws []string, errors []error) {
 		errors = append(errors, fmt.Errorf(
 			"%q cannot begin with a hyphen: %q", k, value))
 	}
+	if regexp.MustCompile(`^internal-`).MatchString(value) {
+		errors = append(errors, fmt.Errorf(
+			`%q cannot begin with "internal-": %q`, k, value))
+	}
 	return
 }
 
diff --git a/internal/service/elbv2/validate_test.go b/internal/service/elbv2/validate_test.go
index 49a30cc7e44..72dd9c1c5f6 100644
--- a/internal/service/elbv2/validate_test.go
+++ b/internal/service/elbv2/validate_test.go
@@ -23,6 +23,7 @@ func TestValidName(t *testing.T) {
 		"tf-test-elb-tf-test-elb-tf-test-elb",
 		"-tf-test-elb",
 		"tf-test-elb-",
+		"internal-tf-test-elb",
 	}
 
 	for _, s := range invalidNames {
@@ -49,6 +50,7 @@ func TestValidNamePrefix(t *testing.T) {
 		"tf.test.elb.",
 		"tf-test",
 		"-test",
+		"internal-",
 	}
 
 	for _, s := range invalidNamePrefixes {