Oxford is a town in Oxford County, Maine, United States. Oxford is included in the Lewiston-Auburn, Maine metropolitan New England City and Town Area. The population was 4,229 at the 2020 census. It contains the census-designated place of the same name. Oxford is home to the Oxford Plains Speedway, Kamp Kohut, the annual Oxford County Fair, and Oxford Casino. The town includes the village of Welchville.