Direct Filing Addresses for Form N-400, Application for Naturalization

When you submit Form N-400 on paper, we will mail you a USCIS Account Acceptance Notice 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.

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.
All Other Applicants
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

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

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

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
Wisconsin
Iowa
Michigan
Minnesota
Ohio
Missouri
Pennsylvania

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

 

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