Nong Bua (Thai: หนองบัว, pronounced [nɔ̌ːŋ būa̯]) is a district (amphoe) in the northeastern part of Nakhon Sawan province, central Thailand.

This place can be considered as the heart of Nong Bua Lamphu Province.

Swamps are the province's symbolic place which absolutely has fascinating scenery.

Neighboring districts are (from the north clockwise): Bang Mun Nak and Dong Charoen of Phichit province; Chon Daen and Bueng Sam Phan of Phetchabun province; and Phaisali, Tha Tako, and Chum Saeng of Nakhon Sawan Province.

The district is divided into nine sub-districts (tambons), which are further subdivided into 105 villages (mubans).