U.S. Citizenship and Immigration Services USCIS U.S. Citizenship and Immigration Services U.S. Citizenship and Immigration Services Servicio de Ciudadanía e Inmigración de los Estados Unidos Servicios de Ciudadanía e Inmigración de Estados Unidos Services de citoyenneté et d'immigration des États-Unis שירותי אזרחות והגירה של ארצות הברית यूएस सिटिजनशिप और इमिग्रेशन सर्विसेज 米国市民権・移民局 Serviços de Cidadania e Imigração dos Estados Unidos 美国公民和移民服务局 USCIS U.S. Citizenship and Immigration Services U.S. Citizenship and Immigration Services (USCIS) is an agency of the U.S. Department of Homeland Security (DHS) that administers the country's naturalization and immigration systems.