Provinces bordering the province include the following:
Northern Border
Adjoins Dan Makham Tia District, Tham Phra District, and Tham Makkha District in Kanchanaburi Province.
Southern Border
Adjoins Khao Yoi District and Nong Ya Plong District in Phetchaburi Province.
Eastern Border
Adjoins Kamphaeng Saen District, Mueang Nakhon Pathom District, and Sam Phran District in Nakhon Pathom Province, as well as Ban Phaeo District in Samut Sakhon Province, and Bang Khonthi District and Amphawa District in Samut Songkhram Province.
Western Border
Adjoins the Republic of the Union of Myanmar.