Service Center

Petitions

Regular processing
Mailing Address

Premium Service
Mailing Address

Vermont Service Center (VSC)

I-129  H, L, O, P petitions for nonimmigrant workers
The beneficiary will work temporarily in:
Alabama, Arkansas, Connecticut, Delaware, the 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, U.S. Virgin Islands, or West Virginia.

H-1B Cap Cases:
USCIS
Vermont Service Center
ATTN: H-1B Cap
4 Lemnah Drive
St. Albans. VT 05479-0001
H-1B U.S. Master’s Cap Cases:
USCIS
Vermont Service Center
ATTN: H-1B U.S. Master’s Cap
4 Lemnah Drive
St. Albans. VT 05479-0001
All other I-129 Cases:
USCIS
Vermont Service Center
ATTN: I-129
75 Lower Weldon Street
St. Albans, VT 05479-0001

H-1B Cap Cases:
Premium Processing Service
USCIS
Vermont Service Center
ATTN: H-1B Cap
30 Houghton Street
St. Albans. VT 05478-2399
H-1B U.S. Master’s Cap Cases:
Premium Processing Service
USCIS
Vermont Service Center
ATTN: H-1B U.S. Master’s Cap
30 Houghton Street
St. Albans. VT 05478-2399
All other I-129 Cases:
Premium Processing Service
USCIS
Vermont Service Center
ATTN: I-129
30 Houghton Street
St. Albans. VT 05478-2399

Form I-907/I-129 E-mail address:
VSC-Premium.Processing @dhs.gov

I-485 Adjustment of Status filing because you are:
 1. The beneficiary of an approved Form I-360, Petition for Amerasian, Widow(er), or Special Immigrant, based on the eligibility category “Battered Spouse/Children,” and you are filing for adjustment of status.
A T or U-based nonimmigrant. You must include a copy of your Form I-797C Notice of Action, for approval of your T or U nonimmigrant status, and a copy of your Form I-94, Arrival-Departure Record, and a copy of all pages of your passport with a T or U nonimmigrant visa.

USCIS
Vermont Service Center
Attn: CRU
75 Lower Welden Street
St. Albans, VT 05479-0001

I-539 Application to Extend/Change Nonimmigrant Status filed with a principal’s I-129 where the employment is based in:
Alabama, Arkansas, Connecticut, Delaware, 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, U.S. Virgin Islands, West Virginia, or the District of Columbia
OR
Dependents of major league sports athletes or support personnel (P-4)

USCIS Vermont Service Center
ATTN: I-539
75 Lower Welden Street
St. Albans, VT  05479

I-751 Petition to Remove the Conditions of Residence if you live in:
Alabama, Arkansas, Connecticut, Delaware, Washington, D.C., 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, U.S. Virgin Islands, and West Virginia

USCIS Vermont Service Center
75 Lower Welden Street
P.O. Box 200
St. Albans, VT 05479-0001

I-589 Asylum
If you are not in proceedings in Immigration Court and you live in:
Connecticut, Delaware, Maine, Massachusetts, New Hampshire, New Jersey, New York, eastern Pennsylvania excluding the jurisdiction of the Pittsburgh Sub office*, Rhode Island or Vermont

USCIS Vermont Service Center
Attn: Asylum
75 Lower Welden Street
St. Albans, VT 05479-0589

I-765 Application for Employment Authorization
If you are a: 
T-1, T-2, T-3, T-4, T-5, U-1, U-2, U-3, U-4, U-5 nonimmigrant; have a VAMA/I-485 pending with the VSC; or have been granted deferred action as a surviving spouse/child

This address may be used for both US Postal Service and private courier deliveries:
  
USCIS
Vermont Service Center
Attn:  I-765
75 Lower Welden Street
St. Albans, VT 05479-0001

Nebraska Service Center (NSC)

I-140 employment based immigration petition (with or without a concurrent I-485) filed with I-907 request for premium processing and the employment will be in:
Alaska, Arizona, California, Colorado, CNMI, Guam, Hawaii, Idaho, Illinois, Indiana, Iowa, Kansas, Michigan, Minnesota, Missouri, Montana, Nebraska, Nevada, North Dakota, Ohio, Oregon, South Dakota, Utah, Washington, Wisconsin, or Wyoming

U.S. Postal Service deliveries:
Premium Processing
USCIS Nebraska Service Center
P.O. Box 87103
Lincoln, NE 68501-7103
For express mail and courier deliveries:
Premium Processing
USCIS Nebraska Service Center
850 S. Street
Lincoln, NE 68508
E-mail Address:
NSC-Premium.140@dhs.gov

I-589 Asylum
If you are not in proceedings in Immigration Court and you live in:
Alaska, northern California**, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Michigan, Minnesota, Missouri, Montana, Nebraska, northern Nevada in the jurisdiction of the Reno Sub office***, North Dakota, Ohio, Oregon, South Dakota,
Washington or Wisconsin

USCIS
Nebraska Service Center P.O. Box 87589
Lincoln, NE 68501-7589

N-400 Application for Naturalization from Current or Former Members of the Military, Spouses of Current Members of the Military, and Close Relatives of Deceased Members of the Military

Nebraska Service Center
P.O. Box 87426
Lincoln, NE 68501-7426
Express Mail or courier deliveries:
Nebraska Service Center
850 S. Street
Lincoln, NE 68508

Texas Service Center (TSC)

I-140 employment based immigration petitions (with or without a concurrent I-485) filed with I-907 request for premium processing and the employment will be in:
Alabama, Arkansas, Connecticut, Delaware, the District of Columbia, Florida, Georgia, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Mississippi, New Hampshire, New Jersey, New Mexico, New York, North Carolina, South Carolina, Oklahoma, Pennsylvania, Puerto Rico, Rhode Island, Tennessee, Texas, Vermont, Virginia, U.S. Virgin Islands and West Virginia.

U.S. Postal Service deliveries:
Premium Processing
USCIS Texas Service Center
P.O. Box 279030
Dallas, TX 75227-9030
For express mail and courier deliveries:
Premium Processing
USCIS Texas Service Center
4141 North St. Augustine Road
Dallas, TX 75227
E-mail Address:
TSC-Premium.140@dhs.gov

I-589 Asylum
If you are not in proceedings in Immigration Court and you live in:
Alabama, Arkansas, Colorado, Puerto Rico, District of Columbia, Florida, Georgia, Louisiana,
Maryland, Mississippi, New Mexico, North Carolina, Oklahoma,
western Pennsylvania in the jurisdiction of the Pittsburgh Sub office*, South Carolina, Tennessee, Texas, U.S. Virgin Islands,
Utah, Virginia, West Virginia or Wyoming

USCIS Texas Service Center Attn: Asylum
P.O. Box 851892
Mesquite, TX 75185-1892

California Service Center
(CSC)

I-129  H, L, O, P petitions for nonimmigrant workers
The beneficiary will work temporarily in:
Alaska, Arizona, California, Colorado, Guam, Hawaii, Idaho, Illinois, Indiana, Iowa, Kansas, Michigan, Minnesota, Missouri, Montana, Nebraska, Nevada, North Dakota, Ohio, Oregon, South Dakota, Utah, Washington, Wisconsin or Wyoming.

H-1B Cap Cases:
USCIS
California Service Center
ATTN: H-1B Cap
P.O. Box 10129
Laguna Niguel, CA 92607-1012
U.S. Masters Cap Cases:
USCIS
California Service Center
ATTN: H-1B U.S. Masters Cap
P.O. Box 10129
Laguna Niguel, CA  92607-1012
H-1B Extensions:
USCIS
California Service Center
ATTN: H-1B Extensions
P.O. Box 10129
Laguna Niguel, CA  92607-1012
All other I-129 Cases:
USCIS
California Service Center
ATTN: I-129
P.O. Box 10129
Laguna Niguel, CA 92607-1012
Courier Address for All I-129s:
USCIS
California Service Center
24000 Avila Road
2nd Floor, Room 2312
Laguna Niguel, CA  92677
(Please note the type of I-129 in the attention line)

For Premium Processing
Form I-907/I-129 Regular Mailing Address:
Premium Processing Service
USCIS
California Service Center
P.O. Box 10825
Laguna Niguel, CA 92607
(Please note the type of I-129 in the attention line)

Form I-907/I-129 Courier Mail Address:
Premium Processing Service
USCIS
California Service Center
24000 Avila Road
2nd Floor, Room 2312
Laguna Niguel, CA  92677
(Please note the type of I-129 in the attention line)

Form I-907/I-129 E-Mail Address:
CSC-Premium.Processing@dhs.gov

I-129 H-1B cap exempt petitions

For Direct Mail:

U. S. Citizenship and Immigration Services
California Service Center
ATTN: CAP EXEMPT H-1B Processing Unit
P.O. BOX 30040
Laguna Niguel, CA 92607-3004
For non-United States Postal Service deliveries (e.g. private couriers):

U. S. Citizenship and Immigration Services
California Service Center
ATTN: CAP EXEMPT H-1B Processing Unit
24000 Avila Road, Room 2312
Laguna Niguel, CA 92677
Each H-1B petitioner is encouraged to mark the outside of the envelope and the top margin of the I-129 form, with “EXEMPT.”

I-751 Petition to Remove the Conditions of Residence if you live in:
Alaska, American Samoa, Arizona, California, Colorado, Guam, Hawaii, Idaho, Illinois, Indiana, Iowa, Kansas, Michigan, Minnesota, Missouri, Montana, Nebraska, Nevada, North Dakota, Ohio, Oregon, South Dakota, Utah, Washington, Wisconsin, and Wyoming

USCIS California Service Center
P.O. Box 10751
Laguna Niguel, CA 92607-1075

I-829 Petition by Entrepreneur to Remove Conditions

USCIS California Service Center
P.O. Box 10526
Laguna Niguel, CA 92607-0526

I-924 Application for Regional Center Under the Immigrant Investor Pilot Program

For U.S. Postal Service:
U.S. Citizenship and Immigration Services
California Service Center
Attn: EB-5 Processing Unit
P.O. Box 10526
Laguna Niguel, CA 92607-0526
For non-U.S. Postal Service deliveries (e.g., private couriers), send to:
U.S. Citizenship and Immigration Services
California Service Center
Attn: EB-5 Processing Unit
24000 Avila Road, 2nd Floor
Laguna Niguel, CA 92677

I-539 petition filed with a principal’s Form I-129 that was based on employment in:
Alaska, Arizona, California, Colorado, Guam, Hawaii, Idaho, Nevada, Illinois, Indiana, Iowa, Kansas, Michigan, Minnesota, Missouri, Montana, Nebraska, North Dakota, Ohio, Oregon, South Dakota, Utah, Washington, Wisconsin or Wyoming,

U.S. Postal Service deliveries
USCIS California Service Center
P.O. Box 10129
Laguna Niguel, CA 92607-1012
For Express mail and courier deliveries: 
USCIS California Service Center
24000 Avila Road, 2nd Floor, Room 2312
Laguna Niguel, CA 92677

I-589 Asylum

If you are not in proceedings in Immigration Court and you live in:
Arizona, southern California**, Hawaii, southern Nevada in the jurisdiction of the Las Vegas Sub office***, or Guam

USCIS
California Service Center P.O. Box 10589
Laguna Niguel, CA 92607

Chicago Lockbox

I-485 Adjustment of Status based on being a(n):

Spouse, parent, unmarried son/daughter under age 21 of a U.S. Citizen with an approved or concurrently filed Form I-130;

Beneficiary of an approved Form I-130 filed by a qualifying relative; Qualifying derivative, family-based beneficiary;

K-1 Fiancé(e) (and K-2 dependents) whose Form I-485 is based on an approved Form I-129F;

Applicants who are beneficiaries of an accepted, approved, or concurrently filed Form I-360, Petition for Amerasian, Widow(er), or Special Immigrant, as a battered spouse or child; Widow(er) of a U.S. Citizen; Special Immigrant Armed Forces Member; or Special immigrant juvenile.

Applicants eligible under the Cuban Adjustment Act of November 2, 1965;

Registry applicant filing for I-485 based on continuous residence in the U.S. since before January 1, 1972;
Diversity lottery winner eligible to file Form I-485;

Public Interest Parolees from certain former Soviet and Southeast Asian countries filing Form I-485 under Public Law 101-167 (the “Lautenberg Amendment”);

Registry applicant filing Form I-485 based on birth in the U.S. to a foreign diplomatic officer;

Former diplomat filing Form I-485 under Section 13 of the Immigration and Nationality Act;

Applicants who are beneficiaries of Private Bills.

For U.S. Postal Service deliveries:
USCIS
P.O. Box 805887
Chicago, IL 60680-4120
For Express mail and courier deliveries:
USCIS
Attn: FBAS
131 South Dearborn – 3rd Floor
Chicago, IL 60603-5517

I-131 Application for Travel Document filed with an I-485 OR based on a pending I-485 with I-797C receipt number beginning with MSC (or without a 3 letter beginning)

USCIS
P.O. Box 805887
Chicago, IL  60680-4120
For private courier (non-USPS) deliveries:
Express Mail and courier deliveries:

USCIS
ATTN: FBAS
131 S. Dearborn,-3rd Floor
Chicago, IL 60603-5517

I-130, Petition for Alien Relative (without an I-485 concurrent filed)
If you are filing this form and live in:
Alabama, Arkansas, Connecticut, Delaware, Georgia, Illinois, Indiana, Iowa, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, New Hampshire, New Jersey, New York, North Carolina, Ohio, Pennsylvania, Rhode Island, South Carolina, Tennessee, Vermont, Virginia, Washington DC, West Virginia, Wisconsin, or outside the United States.

U.S. Postal Service deliveries:
USCIS
PO Box 804625
Chicago, IL 60680-4107

For Express mail and commercial courier deliveries:

USCIS
Attn: I-130
131 South Dearborn-3rd FL
Chicago, IL 60603-5517

I-130, Petition for Alien Relative filed with an I-485

For U.S. Postal Service: 
USCIS
P.O. Box 805887
Chicago, IL 60680-4120 
For Express mail and courier deliveries: 
USCIS
FBAS
131 South Dearborn-3rd Floor
Chicago, IL 60603-5517

I-765 Application for Employment Authorization filed based on a pending family-based Form I-485

For U.S. Postal Service:
USCIS
P.O. Box 805887
Chicago, IL 60680-4120
For Express mail and courier deliveries:
USCIS
Attn: FBAS
131 South Dearborn-3rd Floor
Chicago, IL 60603-5517

Dallas Lockbox

I-526 Immigrant Petition by Alien Entrepreneur

For U.S. Postal Service:
USCIS
P.O. Box 660168
Dallas, TX 75266
For Express mail or courier deliveries:
USCIS
Attn: I-526
2501 S. State Highway 121 Business
Suite 400
Lewisville, TX 75067

I-485 Adjustment of Status based on an accepted or approved I-140; OR an approved I-526 or religious worker I-360 petition and you live 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, Pennsylvania, Puerto Rico, Rhode Island, South Carolina, Oklahoma, Tennessee, Texas, Vermont, Virginia, U.S. Virgin Islands, or West Virginia
You must include a copy of your Form I-797 showing that your petition was either accepted or approved, depending on your petition type.

For U.S. Postal Service Deliveries:
USCIS
PO Box 660867
Dallas, TX 75266     
For Express mail and courier deliveries:
USCIS
Attn: AOS
2501 S. State Hwy, 121 Business
Suite 400
Lewisville, TX 75067

I-360 Immigrant Petition for Special Immigrant Religious Worker if you live 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, Pennsylvania, Puerto Rico, Rhode Island, South Carolina, Oklahoma, Tennessee, Texas, Vermont, Virginia, U.S. Virgin Islands, or West Virginia

For U.S. Postal Service Deliveries:
USCIS
PO Box 660867
Dallas, TX 75266
For Express mail and courier service deliveries:
USCIS
Attn: AOS
2501 S. State Hwy. 121, Business Suite 400
Lewisville, TX 75067

I-765 application for employment authorization filed based on a pending employment-based Form I-485; OR for F-1 OPT, International Organization Immunities Act, or Off-Campus Employment due to severe economic hardship and you live 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, Pennsylvania, Puerto Rico, Rhode Island, South Carolina, Oklahoma, Tennessee, Texas, Vermont, Virginia, U.S. Virgin Islands, or West Virginia

For U.S. Postal Service (USPS) Deliveries:
USCIS
PO Box 660867
Dallas, TX 75266
For Express mail and courier deliveries:
USCIS
Attn: AOS
2501 S. State Hwy. 121 Business
Suite 400
Lewisville, TX 75067

I-539 Application to Extend/Change Nonimmigrant Status not filed with a principal’s I-129; as a CNMI applicant; and  not to or from P-4, A, G, V, or NATO statuses

For U.S. Postal Service: 
USCIS
P.O. Box 660166
Dallas, TX 75266
For Express mail and courier deliveries:
USCIS
ATTN: I-539
2501 S. State Highway 121 Business
Suite 400
Lewisville, TX 75067

I-131 Application for Travel Document based on pending I-485 with I-797C receipt number beginning with EAC or SRC

U.S. Postal Service:
USCIS
PO Box 660867
Dallas, TX 75266
Express mail and courier deliveries:
USCIS
ATTN: AOS
2501 S. State Hwy. 121 Business
Suite 400
Lewisville, TX 75067

I-131 Application for Travel Document for Re-entry permits if you live 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, Pennsylvania, Puerto Rico, Rhode Island, South Carolina, Oklahoma, Tennessee, Texas, Vermont, Virginia, U.S. Virgin Islands, or West Virginia

U.S. Postal Service deliveries:
USCIS
PO Box 660867
Dallas, TX 75266

Express mail and courier deliveries:
USCIS
Attn: AOS
2501 S. State Hwy. 121 Business
Suite 400
Lewisville, TX 75067

N-400 Application for Naturalization and you live 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

U.S. Postal Service deliveries:
USCIS
P.O. Box 660060
Dallas, TX 75266
For Express Mail or courier deliveries:
USCIS
Attn: N-400
2501 S State Hwy 121 Business
Suite 400
Lewisville, TX 75067

Phoenix Lockbox

I-130, Petition for Alien Relative (without an I-485 concurrently filed)
If you are filing this form and live in:
Alaska, American Samoa, Arizona, California, Colorado, the Commonwealth of the Northern Mariana Islands, Florida, Guam, Hawaii, Idaho, Kansas, Montana, Nebraska, Nevada, New Mexico, North Dakota, Oklahoma, Oregon, Puerto Rico, South Dakota, Texas, Utah, Virgin Islands, Washington, Wyoming.

U.S. Postal Service:
USCIS
ATTN: I-130
PO Box 21700
Phoenix, AZ 85036

For Express mail and commercial courier deliveries:

USCIS
Attn: I-130
1820 E. Skyharbor Circle S Suite 100
Phoenix, AZ 85034

I-485 Adjustment of Status based on a pending or approved I-140; OR an approved I-526 or religious worker I-360 petition and you live 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, Guam or the Commonwealth of the Northern Mariana Islands
You must include a copy of your Form I-797 showing that your petition was either accepted or approved, depending on your petition type.

For U.S. Postal Service deliveries: 
USCIS
PO Box 21281
Phoenix, AZ 85036
For Express mail and courier deliveries:
USCIS
Attn: AOS
1820 E. Skyharbor Circle S
Suite 100
Phoenix, AZ 85034
 

I-360 Immigrant Petition for Special Immigrant Religious Worker if you live 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, Guam, or the Commonwealth of Northern Mariana Islands

For U.S. Postal Service deliveries:
USCIS
PO Box 21281
Phoenix, AZ 85036
For Express mail and courier service deliveries:
USCIS
Attn: AOS
1820 E. Skyharbor Circle S
Suite 100
Phoenix, AZ 85034

I-765 application for employment authorization filed based on a pending employment-based Form I-485; OR for F-1 OPT, International Organization Immunities Act, or Off-Campus Employment due to severe economic hardship and you live 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, Guam, or the Commonwealth of Northern Mariana Islands.

For U.S. Postal Service (USPS) deliveries:
USCIS
PO Box 21281
Phoenix, AZ 85036
For Express mail and courier deliveries:
USCIS
Attn: AOS
1820 E. Skyharbor Circle S 
Suite 100
Phoenix, AZ 85034

I-131 Application for Travel Document based on pending I-485 with I-797C receipt number beginning with LIN or WAC

U.S. Postal Service:
USCIS
P.O. Box 21281
Phoenix, AZ 85036
Express mail and courier deliveries:
USCIS
ATTN: AOS
1820 E. Skyharbor Circle S
Suite 100
Phoenix, AZ 85034

I-131 Application for Travel Document for Re-entry permits if you live 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, Guam, or the Commonwealth of Northern Mariana Islands

U.S. Postal Service deliveries:
USCIS
PO Box 21281
Phoenix, AZ 85036
Express mail and courier deliveries:
USCIS
Attn:  AOS
1820 E. Skyharbor Circle S 
Suite 100
Phoenix, AZ 85034

N-400 Application for Naturalization and you live 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

U.S. Postal Service deliveries:
USCIS
P.O. Box 21251
Phoenix, AZ 85036
For Express Mail or courier deliveries:
USCIS
Attn:  N-400
1820 E. Skyharbor Circle S Suite 100
Phoenix, AZ 85034