Click Here for the Latest Oxford County Listings ~ Oxford County is a county located in the U.S. state of Maine with a population of 54,755 as of the 2000 U.S. census. Its county seat is Paris Part of Oxford County is included in the Lewiston-Auburn, Maine, metropolitan New England City and Town Area while a different part of Oxford County is included in the Portland-South Portland-Biddeford, Maine, metropolitan New England City and Town Area. Oxford County was formed on 4 March 1805 from northerly portions of York and Cumberland counties.see more info herehttp://en.wikipedia.org/wiki/Oxford_County,_Maine