AWS SDK Version 3 for .NET
API Reference

AWS services or capabilities described in AWS Documentation may vary by region/location. Click Getting Started with Amazon AWS to see specific differences applicable to the China (Beijing) Region.

This action creates an Amazon S3 bucket. To create an Amazon S3 on Outposts bucket, see CreateBucket.

Creates a new S3 bucket. To create a bucket, you must set up Amazon S3 and have a valid Amazon Web Services Access Key ID to authenticate requests. Anonymous requests are never allowed to create buckets. By creating the bucket, you become the bucket owner.

There are two types of buckets: general purpose buckets and directory buckets. For more information about these bucket types, see Creating, configuring, and working with Amazon S3 buckets in the Amazon S3 User Guide.

  • General purpose buckets - If you send your CreateBucket request to the global endpoint, the request goes to the us-east-1 Region. So the signature calculations in Signature Version 4 must use us-east-1 as the Region, even if the location constraint in the request specifies another Region where the bucket is to be created. If you create a bucket in a Region other than US East (N. Virginia), your application must be able to handle 307 redirect. For more information, see Virtual hosting of buckets in the Amazon S3 User Guide.

  • Directory buckets - For directory buckets, you must make requests for this API operation to the Regional endpoint. These endpoints support path-style requests in the format Virtual-hosted-style requests aren't supported. For more information, see Regional and Zonal endpoints in the Amazon S3 User Guide.

  • General purpose bucket permissions - In addition to the s3:CreateBucket permission, the following permissions are required in a policy when your CreateBucket request includes specific headers:

    • Access control lists (ACLs) - In your CreateBucket request, if you specify an access control list (ACL) and set it to public-read, public-read-write, authenticated-read, or if you explicitly specify any other custom ACLs, both s3:CreateBucket and s3:PutBucketAcl permissions are required. In your CreateBucket request, if you set the ACL to private, or if you don't specify any ACLs, only the s3:CreateBucket permission is required.

    • Object Lock - In your CreateBucket request, if you set x-amz-bucket-object-lock-enabled to true, the s3:PutBucketObjectLockConfiguration and s3:PutBucketVersioning permissions are required.

    • S3 Object Ownership - If your CreateBucket request includes the x-amz-object-ownership header, then the s3:PutBucketOwnershipControls permission is required.

      If your CreateBucket request sets BucketOwnerEnforced for Amazon S3 Object Ownership and specifies a bucket ACL that provides access to an external Amazon Web Services account, your request fails with a 400 error and returns the InvalidBucketAcLWithObjectOwnership error code. For more information, see Setting Object Ownership on an existing bucket in the Amazon S3 User Guide.

    • S3 Block Public Access - If your specific use case requires granting public access to your S3 resources, you can disable Block Public Access. Specifically, you can create a new bucket with Block Public Access enabled, then separately call the DeletePublicAccessBlock API. To use this operation, you must have the s3:PutBucketPublicAccessBlock permission. For more information about S3 Block Public Access, see Blocking public access to your Amazon S3 storage in the Amazon S3 User Guide.

  • Directory bucket permissions - You must have the s3express:CreateBucket permission in an IAM identity-based policy instead of a bucket policy. Cross-account access to this API operation isn't supported. This operation can only be performed by the Amazon Web Services account that owns the resource. For more information about directory bucket policies and permissions, see Amazon Web Services Identity and Access Management (IAM) for S3 Express One Zone in the Amazon S3 User Guide.

    The permissions for ACLs, Object Lock, S3 Object Ownership, and S3 Block Public Access are not supported for directory buckets. For directory buckets, all Block Public Access settings are enabled at the bucket level and S3 Object Ownership is set to Bucket owner enforced (ACLs disabled). These settings can't be modified.

    For more information about permissions for creating and working with directory buckets, see Directory buckets in the Amazon S3 User Guide. For more information about supported S3 features for directory buckets, see Features of S3 Express One Zone in the Amazon S3 User Guide.

HTTP Host header syntax

Directory buckets - The HTTP Host header syntax is

The following operations are related to CreateBucket:


For .NET Core this operation is only available in asynchronous form. Please refer to PutBucketAsync.

Namespace: Amazon.S3
Assembly: AWSSDK.S3.dll
Version: 3.x.y.z


public virtual PutBucketResponse PutBucket(
         PutBucketRequest request


Type: Amazon.S3.Model.PutBucketRequest

Container for the necessary parameters to execute the PutBucket service method.

Return Value

The response from the PutBucket service method, as returned by S3.


This example shows how to create a bucket in a specific region and with a canned ACL configuring the bucket to be public readable.

PutBucket sample

// Create a client
AmazonS3Client client = new AmazonS3Client();

// Construct request
PutBucketRequest request = new PutBucketRequest
    BucketName = "SampleBucket",
    BucketRegion = S3Region.EU,         // set region to EU
    CannedACL = S3CannedACL.PublicRead  // make bucket publicly readable

// Issue call
PutBucketResponse response = client.PutBucket(request);


Version Information

.NET Framework:
Supported in: 4.5, 4.0, 3.5

See Also