Wynnewood is a city in Garvin County, Oklahoma, United States. It is 67 miles south of Oklahoma City. The population was 1,927 at the time of the 2020 census. Located in what was then the Chickasaw Nation of Indian Territory, it began as a village called "Walner" in 1886, on the proposed route of the Gulf, Colorado and Santa Fe Railway. Railroad workers from Pennsylvania named the community for Wynnewood, a community outside of Philadelphia. The name became official on April 6, 1887.