美国移民暨归化局（英语：Immigration and Naturalization Service）是美国昔日掌管移民暨归化的政府部门，隶属于美国司法部。其职能在2003年1月1日起已为美国国土安全部接收，其绝大部分功能被分配国土安全部属下的三个单位，即美国公民及移民服务局、美国移民及海关执法局（Immigration and Customs Enforcement）和美国海关及边境巡查局。

The United States Immigration and Naturalization Service (INS) was an agency of the U.S. Department of Justice from 1933 to 2003.

Referred to by some as former INS and by others as legacy INS, the agency ceased to exist under that name on March 1, 2003, when most of its functions were transferred to three new entities – U.S. Citizenship and Immigration Services (USCIS), U.S. Immigration and Customs Enforcement (ICE), and U.S. Customs and Border Protection (CBP) – within the newly created Department of Homeland Security, as part of a major government reorganization following the September 11 attacks of 2001.