United States Citizenship and Immigration Services

This website is the official play site of U.S. Citizenship and Immigration Services (USCIS), providing information on the department's organizational profile, immigration services, and citizenship services. U.S. Citizenship and Immigration Services' primary responsibility is to ensure that the United States, as a nation of immigrants, provides accurate and useful information to immigrants, and its main tasks include granting immigration and citizenship benefits, helping to understand citizenship, and ensuring the integrity of the immigration system.