1. All Applicants (with the exception of current or former members of the military, spouses of current members of the military, and close relatives of deceased members of the military. See "2." below.)
If you reside in Alaska, Arizona, California, Colorado, Hawaii, Idaho, Illinois, Indiana, Iowa, Kansas, Michigan, Minnesota, Missouri, Montana, Nebraska, Nevada, North Dakota, Ohio, Oregon, South Dakota, Utah, Washington, Wisconsin, Wyoming, Territory of Guam, or the Commonwealth of the Northern Mariana Islands, send your application to the USCIS Phoenix Lockbox Facility at the following address:
USCIS
P.O. Box 21251
Phoenix, AZ 85036
For Express Mail or courier deliveries, use the following address:
USCIS
Attn: N-400
1820 E. Skyharbor Circle S
Suite 100
Phoenix, AZ 85034
If you reside in Alabama, Arkansas, Connecticut, Delaware, District of Columbia, Florida, Georgia, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Mississippi, New Hampshire, New Jersey, New Mexico, New York, North Carolina, Oklahoma, Pennsylvania, Rhode Island, South Carolina, Tennessee, Texas, Vermont, Virginia, West Virginia, Commonwealth of Puerto Rico, or the U.S. Virgin Islands, send your application to the USCIS Dallas Lockbox Facility at the following address:
USCIS
P.O. Box 660060
Dallas, TX 75266
For Express Mail or courier deliveries, use the following address:
USCIS
Attn: N-400
2501 S State Hwy 121 Business
Suite 400
Lewisville, TX 75067
2. Applications from Current or Former Members of the Military, Spouses of Current Members of the Military, and Close Relatives of Deceased Members of the Military
All naturalization applications filed under the military provisions, sections 328 or 329 of the INA, must send your application to the Nebraska Service Center (NSC) regardless of where you live and whether you are filing from within the United States or abroad. If you are the spouse of a current member of the military, or are the close relative of a deceased family member (319(d)), send your application for naturalization to the NSC regardless of where you live and whether you are filing from the within the United States or abroad. Send your application to:
Nebraska Service Center
P.O. Box 87426
Lincoln, NE 68501-7426
For Express Mail or courier deliveries, use the following address:
Nebraska Service Center
850 S. Street
Lincoln, NE 68508
E-Notification: If you are filing your Form N-400 at one of the USCIS Lockbox facilities, you may elect to receive an e-mail and/or text message notifying you that your application has been accepted. You must complete Form G-1145, E-Notification of Application/Petition Acceptance, and clip it to the first page of your application. To download a copy of Form G-1145, including the instructions, click on the link at the top of the page.
Please note: A Guide to Naturalization (Form M-476) provides important information about citizenship eligibility requirements and processing procedures. The Form N-400 application instructions often refer to information in the Guide. Therefore you should read the Guide carefully before filing this form.
Important filing tips, as well as additional information on fees and customer service, are listed on our Lockbox Filing Tips webpage.
Notes on Filing Fees:
- Fees are accepted in the form of money order, personal check or cashier's check only.
- Filing with Form N-600: If you are filing Form N-400 and Form N-600 at the same time at a lockbox facility, USCIS encourages you to file them separately. However, customers who file Form N-400 and Form N-600 together in one package must submit separate payments for each application, or we will return the applications and fee, for correction and re-filing.
Notice: Individuals who file Form N-400, Application for Naturalization, and later appear at the Application Support Center (ASC) for biometric capturing are required to submit to a photograph and signature process. If USCIS determines you are eligible for naturalization, this photograph taken at the ASC may be digitally placed on your Certificate of Naturalization. Therefore, USCIS recommends that on the day of your ASC appointment, you dress in clothing that is acceptable for display on your Certificate of Naturalization. USCIS will not reject a photograph for use on your Certificate of Naturalization or issue a replacement certificate based solely upon your desire to modify the photograph shown on your certificate.
This version of the N-400, Application for Naturalization, is available above in two files - the instructions and the form itself. We recommend that you download the form directly to your local computer, rather than fill it out through your web browser.
Attorney or representative: You may be represented, at no expense to the U.S. Government, by an attorney or other duly authorized representative. Your representative must submit Form G-28, Notice of Entry or Appearance as Attorney or Representative, with your Form N-400. Your representative may also submit Form G-28 at the time of your interview.
This page can be found at http://www.uscis.gov/n-400
