Marietta is a city in and the county seat of Love County, Oklahoma, United States. The population was 2,719 as of the 2020 Census, a 3.5% increase over the 2,626 reported at the 2010 census, which itself was a 7.4 percent increase from the figure of 2,445 in 2000. Marietta is part of the Ardmore, Oklahoma, Micropolitan Statistical Area. For tourism purposes, the Oklahoma Department of Tourism includes it in 'Chickasaw Country'. It is also a part of the Texoma region.

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