A large part of the district is covered by the Khao Laem Reservoir, an artificial lake formed by the Vajiralongkorn Dam on the Khwae Noi River.

Neighboring jurisdictions are (from the west clockwise) Tanintharyi Division, Mon State and Kayin State of Myanmar, Umphang district of Tak province, and Thong Pha Phum district of Kanchanaburi.

It then consisted of the four tambons: Nong Lu, Prangphle, Laiwo, and Lang Phu Sa.

[4] The district is divided into three subdistricts (tambons), which are further subdivided into 20 villages (mubans).

A 2014 Bangkok Post article said that the "Uttamanusorn Bridge, better known as Saphan Mon,...built almost 30 years ago by the people, for the people of Ban Wangka, a Mon village" is the most popular tourist landmark in the district".