Non Sung (Thai: โนนสูง, Thai: [nōːn sǔːŋ]) is a district (amphoe) in the central part of Nakhon Ratchasima province, northeastern Thailand.
The old name of the district was Klang. The word klang in Thai means 'middle', which refers to the location of the district between the Nok District (now Bua Yai district) and Nai District (Mueang Nakhon Ratchasima district).
When Thai people had to choose a family name at the beginning of the 20th century, many of the locals created names with the word klang.
The district's name was changed from Non Wat to Non Sung in 1939.
Neighbouring districts are (from the north clockwise) Khong, Phimai, Chakkarat, Chaloem Phra Kiat, Mueang Nakhon Ratchasima, Non Thai, and Kham Sakaesaeng.
Ban Non Wat, a village in the district, is an important Bronze Age archaeological site.
Those are other destinations to find places related to Amphoe Non Sung: