The National Immigration Agency of the Ministry of the Interior (NIA; Chinese: 內政部移民署) is the statutory agency under the Ministry of Interior of the Republic of China (Taiwan) which is responsible for immigration, entry and exit security, border services and registration of foreigners.

In 1952, Military Personnel and Civilians Exit and Entry United Scrutiny Department was established and became the authority for border control.

In 1972, the government delegated border control, originally under the defense establishment, to a common administrative agency in response to the needs for social development and consequently the Immigration Bureau under the National Police Agency was established.

[3] For years, Taiwan's border control and immigration had been separately administered by various agencies, resulting in the administrative inefficiency.

[5] The NIA building is accessible within walking distance West from Xiaonanmen MRT station of the Taipei Metro.