diff --git a/.changelog/3d0e99b328234ac884bc58cfed344b21.json b/.changelog/3d0e99b328234ac884bc58cfed344b21.json
new file mode 100644
index 00000000000..ec79bc74eee
--- /dev/null
+++ b/.changelog/3d0e99b328234ac884bc58cfed344b21.json
@@ -0,0 +1,8 @@
+{
+    "id": "3d0e99b3-2823-4ac8-84bc-58cfed344b21",
+    "type": "feature",
+    "description": "Add presign functionality for sts:AssumeRole operation",
+    "modules": [
+        "service/sts"
+    ]
+}
\ No newline at end of file
diff --git a/codegen/smithy-aws-go-codegen/src/main/java/software/amazon/smithy/aws/go/codegen/AwsHttpPresignURLClientGenerator.java b/codegen/smithy-aws-go-codegen/src/main/java/software/amazon/smithy/aws/go/codegen/AwsHttpPresignURLClientGenerator.java
index 2422a7410c7..7d13ae09467 100644
--- a/codegen/smithy-aws-go-codegen/src/main/java/software/amazon/smithy/aws/go/codegen/AwsHttpPresignURLClientGenerator.java
+++ b/codegen/smithy-aws-go-codegen/src/main/java/software/amazon/smithy/aws/go/codegen/AwsHttpPresignURLClientGenerator.java
@@ -100,7 +100,9 @@ public class AwsHttpPresignURLClientGenerator implements GoIntegration {
                     ShapeId.from("com.amazonaws.s3#DeleteBucket")
             ),
             ShapeId.from("com.amazonaws.sts#AWSSecurityTokenServiceV20110615"), SetUtils.of(
-                    ShapeId.from("com.amazonaws.sts#GetCallerIdentity"))
+                    ShapeId.from("com.amazonaws.sts#GetCallerIdentity"),
+                    ShapeId.from("com.amazonaws.sts#AssumeRole")
+            )
     );
 
     // map of service to list of operations for which presignedURL client and operation should
diff --git a/service/sts/api_op_AssumeRole.go b/service/sts/api_op_AssumeRole.go
index 7d00b6bd7fa..9ae61e72c3c 100644
--- a/service/sts/api_op_AssumeRole.go
+++ b/service/sts/api_op_AssumeRole.go
@@ -415,3 +415,27 @@ func newServiceMetadataMiddleware_opAssumeRole(region string) *awsmiddleware.Reg
 		OperationName: "AssumeRole",
 	}
 }
+
+// PresignAssumeRole is used to generate a presigned HTTP Request which contains
+// presigned URL, signed headers and HTTP method used.
+func (c *PresignClient) PresignAssumeRole(ctx context.Context, params *AssumeRoleInput, optFns ...func(*PresignOptions)) (*v4.PresignedHTTPRequest, error) {
+	if params == nil {
+		params = &AssumeRoleInput{}
+	}
+	options := c.options.copy()
+	for _, fn := range optFns {
+		fn(&options)
+	}
+	clientOptFns := append(options.ClientOptions, withNopHTTPClientAPIOption)
+
+	result, _, err := c.client.invokeOperation(ctx, "AssumeRole", params, clientOptFns,
+		c.client.addOperationAssumeRoleMiddlewares,
+		presignConverter(options).convertToPresignMiddleware,
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	out := result.(*v4.PresignedHTTPRequest)
+	return out, nil
+}