Watertown was incorporated in 1780. It is roughly 29.8 square miles in size with an approximated population of 22,514 according to the 2010 census. The Town is a quasi-rural and suburban neighborhood. Watertown is served by both the Watertown and Oakville Post Offices, as Oakville belongs to the Town of Watertown. The zip code for Watertown is 06795 and it is a suburb of Waterbury.