Montville is a town in New London County, Connecticut, United States. The population was 18,546 at the 2000 census and 19,571 at the 2010 census. The villages of Chesterfield, Mohegan, Oakdale, and Uncasville are also part of the Town of Montville; the latter two have their own ZIP codes. Residents of the town often identify with these villages more than the Town of Montville as a whole. The actual center of Oakdale is very small, consisting only of a few private residences and the post office.