diff --git a/.changelog/8859.txt b/.changelog/8859.txt
new file mode 100644
index 00000000000..93b8ad33bf6
--- /dev/null
+++ b/.changelog/8859.txt
@@ -0,0 +1,3 @@
+```release-note:breaking-change
+secretmanager: removed `automatic` field in `google_secret_manager_secret` resource
+```
diff --git a/google/services/secretmanager/resource_secret_manager_secret.go b/google/services/secretmanager/resource_secret_manager_secret.go
index 465b3b044ab..7029de1c794 100644
--- a/google/services/secretmanager/resource_secret_manager_secret.go
+++ b/google/services/secretmanager/resource_secret_manager_secret.go
@@ -89,15 +89,7 @@ encryption is used.`,
 									},
 								},
 							},
-							ExactlyOneOf: []string{"replication.0.automatic", "replication.0.user_managed", "replication.0.auto"},
-						},
-						"automatic": {
-							Type:         schema.TypeBool,
-							Optional:     true,
-							Deprecated:   "`automatic` is deprecated and will be removed in a future major release. Use `auto` instead.",
-							ForceNew:     true,
-							Description:  `The Secret will automatically be replicated without any restrictions.`,
-							ExactlyOneOf: []string{"replication.0.automatic", "replication.0.user_managed", "replication.0.auto"},
+							ExactlyOneOf: []string{"replication.0.user_managed", "replication.0.auto"},
 						},
 						"user_managed": {
 							Type:        schema.TypeList,
@@ -141,7 +133,7 @@ encryption is used.`,
 									},
 								},
 							},
-							ExactlyOneOf: []string{"replication.0.automatic", "replication.0.user_managed", "replication.0.auto"},
+							ExactlyOneOf: []string{"replication.0.user_managed", "replication.0.auto"},
 						},
 					},
 				},
@@ -680,22 +672,12 @@ func flattenSecretManagerSecretReplication(v interface{}, d *schema.ResourceData
 		return nil
 	}
 	transformed := make(map[string]interface{})
-	_, ok := d.GetOk("replication.0.automatic")
-	if ok {
-		transformed["automatic"] =
-			flattenSecretManagerSecretReplicationAutomatic(original["automatic"], d, config)
-	} else {
-		transformed["auto"] =
-			flattenSecretManagerSecretReplicationAuto(original["automatic"], d, config)
-	}
+	transformed["auto"] =
+		flattenSecretManagerSecretReplicationAuto(original["automatic"], d, config)
 	transformed["user_managed"] =
 		flattenSecretManagerSecretReplicationUserManaged(original["userManaged"], d, config)
 	return []interface{}{transformed}
 }
-func flattenSecretManagerSecretReplicationAutomatic(v interface{}, d *schema.ResourceData, config *transport_tpg.Config) interface{} {
-	return v != nil
-}
-
 func flattenSecretManagerSecretReplicationAuto(v interface{}, d *schema.ResourceData, config *transport_tpg.Config) interface{} {
 	if v == nil {
 		return nil
@@ -867,22 +849,11 @@ func expandSecretManagerSecretReplication(v interface{}, d tpgresource.Terraform
 	original := raw.(map[string]interface{})
 	transformed := make(map[string]interface{})
 
-	if _, ok := d.GetOk("replication.0.automatic"); ok {
-		transformedAutomatic, err := expandSecretManagerSecretReplicationAutomatic(original["automatic"], d, config)
-		if err != nil {
-			return nil, err
-		} else if val := reflect.ValueOf(transformedAutomatic); val.IsValid() && !tpgresource.IsEmptyValue(val) {
-			transformed["automatic"] = transformedAutomatic
-		}
-	}
-
-	if _, ok := d.GetOk("replication.0.auto"); ok {
-		transformedAuto, err := expandSecretManagerSecretReplicationAuto(original["auto"], d, config)
-		if err != nil {
-			return nil, err
-		} else {
-			transformed["automatic"] = transformedAuto
-		}
+	transformedAuto, err := expandSecretManagerSecretReplicationAuto(original["auto"], d, config)
+	if err != nil {
+		return nil, err
+	} else {
+		transformed["automatic"] = transformedAuto
 	}
 
 	transformedUserManaged, err := expandSecretManagerSecretReplicationUserManaged(original["user_managed"], d, config)
@@ -895,14 +866,6 @@ func expandSecretManagerSecretReplication(v interface{}, d tpgresource.Terraform
 	return transformed, nil
 }
 
-func expandSecretManagerSecretReplicationAutomatic(v interface{}, d tpgresource.TerraformResourceData, config *transport_tpg.Config) (interface{}, error) {
-	if v == nil || !v.(bool) {
-		return nil, nil
-	}
-
-	return struct{}{}, nil
-}
-
 func expandSecretManagerSecretReplicationAuto(v interface{}, d tpgresource.TerraformResourceData, config *transport_tpg.Config) (interface{}, error) {
 	l := v.([]interface{})
 	if len(l) == 0 {
diff --git a/google/services/secretmanager/resource_secret_manager_secret_test.go b/google/services/secretmanager/resource_secret_manager_secret_test.go
index ec27f0f1184..fdc3e7a0387 100644
--- a/google/services/secretmanager/resource_secret_manager_secret_test.go
+++ b/google/services/secretmanager/resource_secret_manager_secret_test.go
@@ -235,15 +235,6 @@ func TestAccSecretManagerSecret_automaticCmekUpdate(t *testing.T) {
 		ProtoV5ProviderFactories: acctest.ProtoV5ProviderFactories(t),
 		CheckDestroy:             testAccCheckSecretManagerSecretDestroyProducer(t),
 		Steps: []resource.TestStep{
-			{
-				Config: testAccSecretMangerSecret_automaticBasic(context),
-			},
-			{
-				ResourceName:            "google_secret_manager_secret.secret-basic",
-				ImportState:             true,
-				ImportStateVerify:       true,
-				ImportStateVerifyIgnore: []string{"ttl", "replication.0.automatic", "replication.0.auto"},
-			},
 			{
 				Config: testAccSecretMangerSecret_automaticCmekBasic(context),
 			},
@@ -699,38 +690,6 @@ resource "google_secret_manager_secret" "secret-basic" {
 `, context)
 }
 
-func testAccSecretMangerSecret_automaticBasic(context map[string]interface{}) string {
-	return acctest.Nprintf(`
-data "google_project" "project" {
-  project_id = "%{pid}"
-}
-resource "google_kms_crypto_key_iam_member" "kms-secret-binding-1" {
-  crypto_key_id = "%{kms_key_name_1}"
-  role          = "roles/cloudkms.cryptoKeyEncrypterDecrypter"
-  member        = "serviceAccount:service-${data.google_project.project.number}@gcp-sa-secretmanager.iam.gserviceaccount.com"
-}
-resource "google_kms_crypto_key_iam_member" "kms-secret-binding-2" {
-  crypto_key_id = "%{kms_key_name_2}"
-  role          = "roles/cloudkms.cryptoKeyEncrypterDecrypter"
-  member        = "serviceAccount:service-${data.google_project.project.number}@gcp-sa-secretmanager.iam.gserviceaccount.com"
-}
-resource "google_secret_manager_secret" "secret-basic" {
-  secret_id = "tf-test-secret-%{random_suffix}"
-  
-  labels = {
-    label = "my-label"
-  }
-  replication {
-    automatic = true
-  }
-  depends_on = [
-    google_kms_crypto_key_iam_member.kms-secret-binding-1,
-    google_kms_crypto_key_iam_member.kms-secret-binding-2,
-  ]
-}
-`, context)
-}
-
 func testAccSecretMangerSecret_automaticCmekBasic(context map[string]interface{}) string {
 	return acctest.Nprintf(`
 data "google_project" "project" {
diff --git a/website/docs/r/secret_manager_secret.html.markdown b/website/docs/r/secret_manager_secret.html.markdown
index 190b6358900..871e7ddf99a 100644
--- a/website/docs/r/secret_manager_secret.html.markdown
+++ b/website/docs/r/secret_manager_secret.html.markdown
@@ -133,12 +133,6 @@ The following arguments are supported:
 
 <a name="nested_replication"></a>The `replication` block supports:
 
-* `automatic` -
-  (Optional, Deprecated)
-  The Secret will automatically be replicated without any restrictions.
-
-  ~> **Warning:** `automatic` is deprecated and will be removed in a future major release. Use `auto` instead.
-
 * `auto` -
   (Optional)
   The Secret will automatically be replicated without any restrictions.