Thma Bang District is one of six districts (srok) and a municipality of Koh Kong Province in southwest Cambodia. It is about 72 kilometres (45 mi) from central Koh Kong. Thma Bang district is bordered on the east by Sre Ambel District and Aoral District of Kompong Speu Province, on the west by Koh Kong District and Mondol Sima District, on the north by Velveng District and Krovanh District of Pursat Province and on the south by Botumsakor District. Thma Bang district has 6 communes comprising to 17 villages and occupies 3,465 square kilometres (1,338 sq mi).