Nong Muang (Thai: หนองม่วง, pronounced [nɔ̌ːŋ mûa̯ŋ]) is a district (amphoe) in the northern part of Lopburi province, central Thailand.

Following a suggestion issued in 1989,[1] six tambons were separated from Khok Samrong district to form the new minor district (king amphoe) Nong Muang on 1 April 1990.

[3] Neighboring districts are (from the northeast clockwise) Khok Charoen, Sa Bot, Khok Samrong, Ban Mi, and the districts Takhli, Tak Fa and Phaisali of Nakhon Sawan province.

The district is divided into six sub-districts (tambons), which are further subdivided into 67 villages (mubans).

This Lopburi Province location article is a stub.