You may submit Form N-400, Application for Naturalization, either online or by mail. The mailing address for sending the paper version of Form N-400 differs depending on your place of residence.
If you live in
Alaska, Arizona, California, Colorado, Micronesia, Guam, Hawaii, Idaho, Kansas, Mariana Islands, Montana, North Dakota, Nebraska, Nevada, Oregon, Utah, Washington, Wyoming
You should mail your form to:
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
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
You should mail your form to:
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
Illinois, Indiana, Wisconsin, Iowa, Michigan, Minnesota, Ohio, Missouri, Pennsylvania
You should mail your form to:
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
However, there is a special postal address for the military. 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, you must send N-400 application to the following address:
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
Please note that the mailing addresses may change from time to time. So in order to be on the safe side about where to send your Form N-400 you may visit the official USCIS website (https://www.uscis.gov/n-400).