Mombi District () is in Bahmai County, Kohgiluyeh and Boyer-Ahmad province, Iran. Its capital is the city of Qaleh Mombi, whose population at the time of the 2016 National Census 668 people in 156 households.
After the 2016 census, Bahmai-ye Garmsiri-ye Shomali Rural District was separated from Bahmai-ye Garmsiri District in the formation of Mombi District. The village of Qaleh Mombi was elevated to the status of a city.