Nong Han (Thai: หนองหาน, pronounced [nɔ̌ːŋ hǎːn]) is a district (amphoe) of Udon Thani province, northeastern Thailand.

Neighboring districts are (from the south clockwise) Chai Wan, Ku Kaeo, Prachaksinlapakhom, Mueang Udon Thani, Phibun Rak and Thung Fon of Udon Thani province, and Sawang Daen Din of Sakon Nakhon province.

Mueang Nong Han was one of the four original subdivisions of Udon Thani, which were converted into amphoe during the monthon Thesaphiban administrative reforms in 1908.

[1] Tambon Phak Top is to be the site of Thailand's largest biomass-fired power plant if plans by its owner, the Thai Appliance Industry PLC (Thaico) come to fruition.

Missing numbers are tambon which now form the districts Phibun Rak and Ku Kaeo.