Provinces of Indonesia are the 37 largest subdivisions of the Indonesia and the highest tier of the local government (formerly called first-level region provinces or provinsi daerah tingkat I). Provinces are further divided into regencies and cities (formerly called second-level region regencies and cities or kabupaten/kotamadya daerah tingkat II), which are in turn subdivided into districts (kecamatan).

Each province has a local government, headed by a governor, and a legislative body. The governor and members of local representative bodies are elected by popular vote for five-year terms.

Indonesian territory is divided into 37 provinces, which are also grouped into 3 time zones. There are 18 Provinces that are included in the Western Indonesia Time Zone – WIB (Waktu Indonesia bagian Barat), 12 Provinces that are included in the Central Indonesia Time Zone – WITA (Waktu Indonesia bagian Tengah), and 7 Provinces that are included in the Eastern Indonesia Time Zone – WIT (Waktu Indonesia bagian Timur).