The Municipal Affairs Bureau (Chinese: 市政署; Portuguese: Instituto para os Assuntos Municipais) of Macau is an administrative body without political powers responsible for providing certain civic services for the special administrative region and is the successor to the Civic and Municipal Affairs Bureau (Portuguese: Instituto para os Assuntos Cívicos e Municipais) which was abolished in 2019.

The latter was formed to handle the functions of the former municipalities of Macau and their councils and assemblies that were abolished on 1 January 2002, slightly more than two years after Macau became a special administrative region (SAR) of the People's Republic of China.

[1] On 31 December 2001, all the provisional organs were dissolved and the new Civic and Municipal Affairs Bureau (Instituto para os Assuntos Cívicos e Municipais [IACM], 民政總署) took on the roles of the provisional municipal councils, starting from 1 January 2002, under the Secretariat for Administration and Justice of the Macau government.

[2][3] The IACM was given a logo based on the Chinese Han character 民, for "civilian".

[4] All the functions of the former were transferred to the new bureau and a new 25-member municipal affairs advisory council was established.