Sung Noen (Thai: สูงเนิน, pronounced [sǔːŋ nɤ̄ːn]) is a district (amphoe) in western part of Nakhon Ratchasima province, northeastern Thailand.

Sung Noen was the location of two ancient cities, Mueang Sema and Khorakha (Khorat) Pura.

[Note 1][1] Historians believe that Sung Noen is Mueang Rat, a city under the rule of Pho Khun Pha Mueang, one of the rulers who played a great role in establishing the Sukhothai Kingdom, at the beginning of Thai history.

Neighbouring districts are (from the north clockwise) Dan Khun Thot, Kham Thale So, Mueang Nakhon Ratchasima, Pak Thong Chai, Wang Nam Khiao and Sikhio.

Sung Noen is divided into 11 subdistricts (tambons), which are further subdivided into 127 administrative villages (mubans).