The town of Plainfield is located in the county of Sullivan. It covers a total area of 137.0 sq. km. Businesses related to auto dealership of used and new cars, supplies of building materials, dairy, supplies of clothing accessories, supplies of landscaping equipments, industrial and commercial machinery, contracting in remodeling and repairing and tourism, contribute to the economy. Commercial spaces are utilized by educational institutions, farmers market, arts and crafts shops and garden centers.