Plainfield is a census-designated place (CDP) comprising the main village of the town of Plainfield, Washington County, Vermont, United States.

[2] According to the United States Census Bureau, the Plainfield CDP has a total area of 0.23 square miles (0.60 km2), of which 0.23 square miles (0.59 km2) is land and 0.004 square miles (0.01 km2), or 2.18%, is water.

[3] The village is located in the northern corner of the town of Plainfield along U.S. Route 2, 10 miles (16 km) east of Montpelier, the state capital, and 28 miles (45 km) west of St. Johnsbury.

Goddard College is located just to the west of the CDP.

Plainfield is located on the Winooski River.