Marietta is a city in Love County, Oklahoma, United States. The population was 2,445 at the 2000 census. It is the county seat of Love County.
Marietta is part of the Ardmore, Oklahoma Micropolitan Statistical Area.
Marietta is located at 33°56′8″N 97°7′12″W / 33.93556°N 97.12°W / 33.93556; -97.12 (33.935551, -97.119867).