Mueang Kanchanaburi (, ) is the capital district (amphoe mueang) of Kanchanaburi province, western Thailand.
Mueang Kanchanaburi changed status to become the capital district (amphoe mueang) of Kanchanaburi Province in 1913. The old district office was in subdistrict Ban Nuea. It was moved to subdistrict Pak Phraek on 1 October 1954.
The district is home to the "bridge over the River Kwai", part of World War II's Death Railway.
Neighboring are (from west clockwise) Tanintharyi Division of Myanmar, Sai Yok, Si Sawat, Bo Phloi, Phanom Thuan, Tha Muang, and Dan Makham Tia of Kanchanaburi Province.
The district is located in the southern foothills of the province.
The Khwae Noi and Khwae Yai Rivers are important water resources which join at the town Kanchanaburi to form the Mae Klong River.
Phu Nam Ron is a transnational cross-border point at the western end of the district. It is expected to gain in importance if the planned Dawei deepwater port project goes ahead, along with a highway and a railway line between Bangkok and that harbor.
The district is divided into thirteen subdistricts (tambons), which are further subdivided into 102 administrative villages (mubans).
<small>Missing numbers belong to subdistricts which now form Dan Makham Tia district</small>
As of December 2024 there are six municipal (thesaban) areas in the district.
Mueang Kanchanaburi and Pak Phraek are town municipalities (thesaban mueang), Pak Phraek covers parts of Pak Phraek subdistrict, Mueang Kanchanaburi covers the subdistricts Ban Nuea and Ban Tai and parts of Pak Phraek and Tha Makham and also parts of Tha Lo subdistrict from Tha Muang district.
Tha Makham, Nong Bua, Kaeng Sian and Lat Ya are subdistrict municipalities (thesaban tambon), they all cover parts of their same-named subdistricts.
The non-municipal areas are administered by nine subdistrict administrative organization - SAO (ongkan borihan suan tambon - o bo toh).
Mueang Kanchanaburi district is served by four hospitals
In the district there are twenty-one health-promoting hospitals in total.
There are seventy-nine Theravada Buddhist temples in the district.
The Christians have twelve churches and muslims have one mosque.