diff --git a/.changelog/25260.txt b/.changelog/25260.txt
new file mode 100644
index 00000000000..9a95512ae4b
--- /dev/null
+++ b/.changelog/25260.txt
@@ -0,0 +1,3 @@
+```release-note:enhancement
+resource/aws_s3_bucket_metric: Add validation to ensure name is <= 64 characters.
+```
diff --git a/internal/service/s3/bucket_metric.go b/internal/service/s3/bucket_metric.go
index d44d545f5b3..7f72be95f07 100644
--- a/internal/service/s3/bucket_metric.go
+++ b/internal/service/s3/bucket_metric.go
@@ -10,6 +10,7 @@ import (
 	"github.com/hashicorp/aws-sdk-go-base/v2/awsv1shim/v2/tfawserr"
 	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/resource"
 	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/validation"
 	"github.com/hashicorp/terraform-provider-aws/internal/conns"
 	tftags "github.com/hashicorp/terraform-provider-aws/internal/tags"
 	"github.com/hashicorp/terraform-provider-aws/internal/tfresource"
@@ -52,9 +53,10 @@ func ResourceBucketMetric() *schema.Resource {
 				},
 			},
 			"name": {
-				Type:     schema.TypeString,
-				Required: true,
-				ForceNew: true,
+				Type:         schema.TypeString,
+				Required:     true,
+				ForceNew:     true,
+				ValidateFunc: validation.StringLenBetween(1, 64),
 			},
 		},
 	}
diff --git a/website/docs/r/s3_bucket_metric.html.markdown b/website/docs/r/s3_bucket_metric.html.markdown
index 8474e2ed90c..85c6540b374 100644
--- a/website/docs/r/s3_bucket_metric.html.markdown
+++ b/website/docs/r/s3_bucket_metric.html.markdown
@@ -52,7 +52,7 @@ resource "aws_s3_bucket_metric" "example-filtered" {
 The following arguments are supported:
 
 * `bucket` - (Required) The name of the bucket to put metric configuration.
-* `name` - (Required) Unique identifier of the metrics configuration for the bucket.
+* `name` - (Required) Unique identifier of the metrics configuration for the bucket. Must be less than or equal to 64 characters in length.
 * `filter` - (Optional) [Object filtering](http://docs.aws.amazon.com/AmazonS3/latest/dev/metrics-configurations.html#metrics-configurations-filter) that accepts a prefix, tags, or a logical AND of prefix and tags (documented below).
 
 The `filter` metric configuration supports the following: