Skip to main content
All CollectionsCitizenship Articles
USCIS mailing address for Citizenship
USCIS mailing address for Citizenship

Where to mail your U.S. Citizenship N-400 application

TrueVisa Team avatar
Written by TrueVisa Team
Updated over a week ago

Several factors can impact where to submit your U.S. Citizenship application. The first factor is how you apply. You can apply for U.S. citizenship two ways:

  1. Or you can file file online through the USCIS portal. You can find out more about that here.

Filing USCIS form N-400 by mail

If you file using the N-400 form, you'll need to mail the form directly to a USCIS lockbox facility. The address where you should mail your application varies by where you live. Below you'll find the corresponding lockbox facility where you should mail your N-400 application. Keep in mind that applications not submitted to the appropriate facility could experience processing delays or potentially be lost.

N-400 Filing Address for non U.S. military

If you live in:

Mail your form to:

Connecticut
Delaware
District of Columbia
Florida
Georgia
Maine
Maryland
Massachusetts
New Hampshire
New Jersey
New York
North Carolina
Pennsylvania
Rhode Island
South Carolina
Vermont
Virginia
West Virginia

USCIS Elgin Lockbox

U.S. Postal Service (USPS):

USCIS
Attn: N-400
P.O. Box 4060
Carol Stream, IL 60197-4060

FedEx, UPS, and DHL deliveries:

USCIS
Attn: N-400 (Box 4060)
2500 Westfield Drive
Elgin, IL 60124-7836

Alabama
Alaska
American Samoa
Arizona
Armed Forces Americas
Armed Forces Europe
Armed Forces Pacific
California
Colorado
Commonwealth of the Northern Mariana Islands
Guam
Hawaii
Idaho
Kansas
Kentucky
Marshall Islands
Micronesia
Minnesota
Mississippi
Montana
Nebraska
Nevada
New Mexico
North Dakota
Oregon
Palau
Puerto Rico
South Dakota
Tennessee
U.S. Virgin Islands
Utah
Washington
Wyoming

USCIS Phoenix Lockbox

U.S. Postal Service (USPS):

USCIS
Attn: N-400
P.O. Box 21251
Phoenix, AZ 85036-1251

FedEx, UPS, and DHL deliveries:

USCIS
Attn: N-400 (Box 21251)
1820 E. Skyharbor Circle S
Suite 100
Phoenix, AZ 85034-4850

Arkansas
Louisiana
Oklahoma
Texas

USCIS Dallas Lockbox

U.S. Postal Service (USPS):

USCIS
Attn: N-400
P.O. Box 660060
Dallas, TX 75266-0060

FedEx, UPS, and DHL deliveries:

USCIS
Attn: N-400 (Box 660060)
2501 S State Hwy 121 Business
Suite 400
Lewisville, TX 75067-8003

Illinois
Indiana
Iowa
Michigan
Missouri
Ohio
Wisconsin

USCIS Chicago Lockbox

U.S. Postal Service (USPS):

USCIS
Attn: N-400
P.O. Box 4380
Chicago, IL 60680-4380

FedEx, UPS, and DHL deliveries:

USCIS
Attn: N-400 (Box 4380)
131 S. Dearborn, 3rd Floor
Chicago, IL 60603-5517

N-400 Filing address for Current or Former Members of the Military and Their Dependents

If you are applying based on:

Mail your form to:

  • Being a current or former member of the military;

  • Being a spouse of a current member of the military; or

  • Being a spouse, parent or child of a deceased member of the military

USCIS Chicago Lockbox

U.S. Postal Service (USPS):

USCIS
Attn: Military N-400
P.O. Box 4446
Chicago, IL 60680-4446

FedEx, UPS, or DHL deliveries:

USCIS
Attn: Military N-400 (Box 4446)
131 S. Dearborn, 3rd Floor
Chicago, IL 60603-5517

  • Being a current or former service member residing outside of the United States and you are applying for an advance parole document at the same time you file your Form N-400

See the “Advance Parole Document for current and former service members outside of the U.S.” section of our Direct Filing Addresses for Form I-131, Application for Travel Document page.

After submitting your Form N-400 by mail, USCIS will mail you an Account Acceptance Notice with instructions on how to create a USCIS online account. This will help you to track and manage your case.

Did this answer your question?