Plainfield is a town in Windham County, Connecticut, United States.

Each village has their own respective United States Post Office and fire department.

[2] 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.

Also, the town annually has the V-J Day parade, said to be the oldest in the United States.

The Moosup River feeds the Quinebaug and runs across the northern portion of town.

There is no direct air, passenger rail, or navigable water access to Plainfield, although the town is serviced by the Providence and Worcester Railroad (freight only), which also parallels the Connecticut Turnpike corridor.

There is limited public transport system available in the town; combined with a lack of a sidewalk and/or segregated cycle facilities network and the large area of the town, this necessitates that most transit is done by car.

Providence, RI is the closest major city, 30 miles (48 km) to the east.

Nearby Amtrak passenger rail stations include New London (NLC) and Providence (PVD); both are roughly 40 minute drives.