Mounds, OK. Mounds is a town in Creek County, Oklahoma, United States. Mounds is located just south of Tulsa; the population was 1,153 at the 2000 census. Mounds is located at 35°52′34″N 96°03′36″W / 35.876076°N 96.059951°W / 35.876076; -96.059951. According to the United States Census Bureau, the town has a total area of 1.2 square miles (3.0 km2), all of it land.