Kotamobagu is a city in North Sulawesi, Indonesia. Having previously been a town within the Bolaang Mongondow Regency, Kotamobagu was separated from that regency on 2 January 2007 to become an autonomous city. It is the principal centre of the southern part of the province, the Bolaang Mongondow region, which has been under consideration by the Indonesian government to be separated from the rest of North Sulawesi and formed into a separate province.