Okmulgee is a city in and the county seat of Okmulgee County, Oklahoma, United States, and is part of the Tulsa Metropolitan Area. The name is from the Muskogee word okimulgi, which means "boiling waters". The site was chosen because of the nearby rivers and springs. Okmulgee is 38 miles south of Tulsa and 13 miles north of Henryetta via US-75.