Nong Don (Thai: หนองโดน, pronounced [nɔ̌ːŋ dōːn]) is a district (amphoe) in the northwestern part of Saraburi province in central Thailand.

Ten kilometres from Bang Khamoad (today's Ban Mo district) there is a big pond.

The west side of the pond has a big tummy-wood tree (Careya sphaerica Roxb.)

The people from Dong Noi and Kokko and Mueang Lop Buri moved to here and established the village Ban Nong Kradon.

The district is divided into four sub-districts (tambons), which are further subdivided into 34 villages (mubans).