U.S. Citizenship and Immigration Services (USCIS) is a federal agency within the Department of Homeland Security (DHS) that oversees lawful immigration to the United States. USCIS processes applications for green cards, citizenship, work permits, family‑based immigration, employment‑based immigration, asylum, humanitarian programs, and other immigration benefits.
The agency is responsible for verifying eligibility, conducting interviews, reviewing documentation, and ensuring compliance with U.S. immigration laws. USCIS plays a central role in maintaining the integrity, security, and efficiency of the U.S. immigration system.

