diff --git a/aws/data_source_aws_outposts_outpost.go b/aws/data_source_aws_outposts_outpost.go
index c4a1a9eefaa4..54f22fa0e6ac 100644
--- a/aws/data_source_aws_outposts_outpost.go
+++ b/aws/data_source_aws_outposts_outpost.go
@@ -14,8 +14,10 @@ func dataSourceAwsOutpostsOutpost() *schema.Resource {
 
 		Schema: map[string]*schema.Schema{
 			"arn": {
-				Type:     schema.TypeString,
-				Computed: true,
+				Type:         schema.TypeString,
+				Optional:     true,
+				Computed:     true,
+				ValidateFunc: validateArn,
 			},
 			"availability_zone": {
 				Type:     schema.TypeString,
@@ -76,6 +78,10 @@ func dataSourceAwsOutpostsOutpostRead(d *schema.ResourceData, meta interface{})
 				continue
 			}
 
+			if v, ok := d.GetOk("arn"); ok && v.(string) != aws.StringValue(outpost.OutpostArn) {
+				continue
+			}
+
 			results = append(results, outpost)
 		}
 
diff --git a/aws/data_source_aws_outposts_outpost_test.go b/aws/data_source_aws_outposts_outpost_test.go
index 2b236dfa1203..c4bc6899ac44 100644
--- a/aws/data_source_aws_outposts_outpost_test.go
+++ b/aws/data_source_aws_outposts_outpost_test.go
@@ -56,6 +56,31 @@ func TestAccAWSOutpostsOutpostDataSource_Name(t *testing.T) {
 	})
 }
 
+func TestAccAWSOutpostsOutpostDataSource_Arn(t *testing.T) {
+	sourceDataSourceName := "data.aws_outposts_outpost.source"
+	dataSourceName := "data.aws_outposts_outpost.test"
+
+	resource.ParallelTest(t, resource.TestCase{
+		PreCheck:     func() { testAccPreCheck(t); testAccPreCheckAWSOutpostsOutposts(t) },
+		Providers:    testAccProviders,
+		CheckDestroy: nil,
+		Steps: []resource.TestStep{
+			{
+				Config: testAccAWSOutpostsOutpostDataSourceConfigArn(),
+				Check: resource.ComposeTestCheckFunc(
+					resource.TestCheckResourceAttrPair(dataSourceName, "arn", sourceDataSourceName, "arn"),
+					resource.TestCheckResourceAttrPair(dataSourceName, "availability_zone", sourceDataSourceName, "availability_zone"),
+					resource.TestCheckResourceAttrPair(dataSourceName, "availability_zone_id", sourceDataSourceName, "availability_zone_id"),
+					resource.TestCheckResourceAttrPair(dataSourceName, "description", sourceDataSourceName, "description"),
+					resource.TestCheckResourceAttrPair(dataSourceName, "id", sourceDataSourceName, "id"),
+					resource.TestCheckResourceAttrPair(dataSourceName, "name", sourceDataSourceName, "name"),
+					resource.TestCheckResourceAttrPair(dataSourceName, "owner_id", sourceDataSourceName, "owner_id"),
+				),
+			},
+		},
+	})
+}
+
 func testAccAWSOutpostsOutpostDataSourceConfigId() string {
 	return `
 data "aws_outposts_outposts" "test" {}
@@ -79,3 +104,17 @@ data "aws_outposts_outpost" "test" {
 }
 `
 }
+
+func testAccAWSOutpostsOutpostDataSourceConfigArn() string {
+	return `
+data "aws_outposts_outposts" "test" {}
+
+data "aws_outposts_outpost" "source" {
+  arn = tolist(data.aws_outposts_outposts.test.arns)[0]
+}
+
+data "aws_outposts_outpost" "test" {
+  arn = data.aws_outposts_outpost.source.arn
+}
+`
+}
diff --git a/website/docs/d/outposts_outpost.html.markdown b/website/docs/d/outposts_outpost.html.markdown
index 98cd6f434cbd..82c2ea1d47b2 100644
--- a/website/docs/d/outposts_outpost.html.markdown
+++ b/website/docs/d/outposts_outpost.html.markdown
@@ -24,12 +24,12 @@ The following arguments are supported:
 
 * `id` - (Optional) Identifier of the Outpost.
 * `name` - (Optional) Name of the Outpost.
+* `arn` - (Optional) Amazon Resource Name (ARN).
 
 ## Attribute Reference
 
 In addition to all arguments above, the following attributes are exported:
 
-* `arn` - Amazon Resource Name (ARN).
 * `availability_zone` - Availability Zone name.
 * `availability_zone_id` - Availability Zone identifier.
 * `description` - Description.