- National Visa Center
- U. S. Citizenship and Immigration Services
- U.S. Customs and Border Protection
- U.S. Department of Homeland Security
- U.S. Department of Justice
- U.S. Department of State
- U.S. Department of State Visa Bulletin
- U.S. Embassies and Consulates
- U.S. Immigration and Customs Enforcement
- USCIS Online Case Status
- USCIS Infopass
- USCIS processing times
- List of Treaty Countries
