Plainfield is a town in Windham County, Connecticut, United States. The population was 14,973 at the 2020 census. The town comprises four villages: Plainfield (south, ZIP code 06374), Moosup (northeast, 06354), Wauregan (northwest, 06387), and Central Village (west, 06332). Each village has their own respective United States Post Office and fire department. The entire town is serviced by the 860 area code. History Plainfield was incorporated in 1699 as the town of Quinebaug and renamed the following year to its current name. The present name of "Plainfield" is descriptive of the original town site. Plainfield proved to be an industrial heavyweight in the 19th and early 20th centuries due largely to the ability of the Moosup and Quinebaug Rivers to provide power to the different mills throughout town. The job opportunities attracted French Canadian Americans, Irish Americans, British Americans, and people other countries during the late 19th century. Combined with the mills, Plainfield had incredible commerce for a small town because four railways from Hartford, New York, Boston, and Providence intersected within the town. There was also a highly acclaimed school on Academy Hill, which is how the present Academy Hill Road got its name. Also, the town annually has the V-J Day parade; in fact, the oldest in the United States. Sites in Plainfield that are listed on the National Register of Historic Places are: Central Village Historic District, a historic district March Route of Rochambeau's Army: Old Canterbury Road Geography Plainfield is located at: 41.6775 N, 71.9220 W. According to the United States Census Bureau, the town has a total area of , of which, of it is land and of it (1.81%) is water. From the southernmost point, Plainfield is inland of the Long Island Sound and Block Island Sound (Atlantic Ocean). Plainfield is the southernmost town of Windham County. The Quinebaug River generally forms the western border of the town. The Moosup River feeds the Quinebaug and runs across the northern portion of town. Transportation Plainfield is bisected by the Connecticut Turnpike (I-395 and CT 695) and is serviced by three exits: Lathrop Road at exit 28, CT 14A at exit 29, and CT 14 at exit 32. All exits are off the I-395 portion of the Turnpike, which runs north and south. Exit 35 off I-395 North is in Plainfield, but does not offer access to any Plainfield streets. CT 12 generally runs parallel to