Katie is a town in Garvin County, Oklahoma, United States. The town is south of Oklahoma City. It was incorporated in 2004. It had a population of 348 at the 2010 census. As of the 2020 census, Katie had a population of 332. On May 9, 2016, an EF4 tornado touched down in the southern part of Katie, and tracked to the east, causing one death and several injuries.
Katie is located in southern Garvin County, southeast of Elmore City and southwest of Wynnewood. It is southwest of Pauls Valley, the county seat. According to the U.S. Census Bureau, the town has a total area of , of which are land and , or 0.52%, is water.