Starting January 22, 2009, applications will be sent to two regional lockbox facilities. Applicants in the west, Rocky Mountain states and midwest will send their applications to Arizona. Applicants from the eastern and southern US will send their applications to Texas.

West, Mountain West, Midwest

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 Northern Mariana Islands, file your N-400 with:

Mail address:

USCIS Lockbox Facility
U.S. Citizenship and Immigration Services
P.O. Box 21251
Phoenix, AZ 85036

Address for overnight mail services:

USCIS, Attn: N-400
1820 E. Skyharbor Circle S. Floor 1
Phoenix, AZ 85036

East, South

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, Puerto Rico, Rhode Island, South Carolina, Tennessee, Texas, Vermont, Virginia, West Virginia, or U.S. Virgin Islands, file your N-400 with:

Mail address:

USCIS Lockbox Facility
U.S. Citizenship and Immigration Services
P.O. Box 299026
Lewisville, TX 75029

Address for overnight mail services:

USCIS, Attn: N-400
12501 S. State Hwy 121, Bldg. 4
Lewisville, TX 75067

Military applicants will continue to file their applications with the USCIS Nebraska Service Center.