Edition Date

Where to File

You generally have two options for filing your Form N-400 with USCIS:

Online, or

By mail (paper).

Filing your Form N-400 online

You must create a USCIS online account to file your Form N-400 online. Having an online account will also allow you to:

Pay your filing fee online;

Check the status of your case;

Receive notifications and case updates;

View personalized case completion date estimates;

Respond to requests for evidence; and

Manage your contact information, including updating your address.

Note for Attorneys and Accredited Representatives: You can also create an online account, which will allow you to manage all of your clients’ applications in one place.

Filing your Form N-400 by mail

If you are applying based on being a current or former member of the military, a spouse of a current member of the military, or a close relative of a deceased member of the military, do not use this chart. Go to section 3 below to see where you must mail your form.

All other applicants must use the chart below.

If you submit Form N-400 on paper, you will receive a USCIS Account Acceptance Notice in the mail with instructions on how to create an online account to track and manage your case. We will process your application even if you do not create an online account, but we encourage you to create and access your online account. We will continue to mail you copies of notifications about your case.

If you live in: Mail your form to: Alaska

Arizona

California

Colorado

Micronesia

Guam

Hawaii

Idaho

Kansas

Mariana Islands

Montana

North Dakota

Nebraska

Nevada

Oregon

Utah

Washington

Wyoming For U.S. Postal Service (USPS): USCIS

P.O. Box 21251

Phoenix, AZ 85036 For FedEx, UPS, and DHL deliveries: USCIS

Attn: N-400

1820 E. Skyharbor Circle S

Suite 100

Phoenix, AZ 85034 If you live in: Mail your form to: Alabama

Arkansas

Connecticut

District. Of Columbia

Delaware

Florida

Georgia

Kentucky

Louisiana

Massachusetts

Maryland

Maine

Mississippi

North Carolina

New Hampshire

New Jersey

New Mexico

New York

Oklahoma

Puerto Rico

Rhode Island

South Carolina

South Dakota

Tennessee

Texas

Virginia

Virgin Islands

Vermont

West Virginia For U.S. Postal Service (USPS): USCIS

P.O. Box 660060

Dallas, TX 75266 For FedEx, UPS, and DHL deliveries: USCIS

Attn: N-400

2501 S State Hwy 121 Business

Suite 400

Lewisville, TX 75067 If you live in: Mail your form to: Illinois

Indiana

Wisconsin

Iowa

Michigan

Minnesota

Ohio

Missouri

Pennsylvania For U.S. Postal Service (USPS): USCIS

P.O. Box 4380

Chicago, IL 60680-4380 For FedEx, UPS, and DHL deliveries: USCIS

Attn: N-400

131 S. Dearborn, 3rd Floor

Chicago, IL 60603-5517

Military Members

If you are applying based on being a current or former member of the military; a spouse of a current member of the military; or a spouse, parent or child of a deceased member of the military, you may file your Form N-400 online or by mail. If you choose to file by mail, send your application to the location listed below:

For U.S. Postal Service (USPS):

USCIS

P.O. Box 4446

Chicago, IL 60680-4446

For FedEx, UPS, or DHL deliveries:

USCIS

Attn: Military N-400

131 S. Dearborn, 3rd Floor

Chicago, IL 60603-5517

If you submit Form N-400 on paper, you will receive a USCIS Account Acceptance Notice in the mail with instructions on how to create an online account to track and manage your case. We will process your application even if you do not create an online account, but we encourage you to create and access your online account. We will continue to mail you copies of notifications about your case.

Filing Tips: Go to our Form Filing Tips page for information on how to help ensure we will accept your application.

Don’t forget to sign your form! We will reject any unsigned form.