Nok Ok () is a subdistrict (tambon) and a subdistrict municipality (thesaban tambon) in Pak Thong Chai District, Nakhon Ratchasima Province, Thailand.
Neighboring subdistricts are (from the north clockwise): Mueang Pak, Don, Kaem Sap, Sakae Rat, and Ngio.
While the subdistrict (tambon) Nok Ok is much older, the Tambon administrative organization (TAO) as the local administration unit was established in 1996. Effective June 30, 2008 it was upgraded to a subdistrict municipality.
The subdistrict is divided into 10 administrative villages (muban).