Plainfield, OH is a city located in Coshocton County, Ohio and has a land area of 0.12 square miles (0.31 km2). The water area for the city is 0.00 square miles or 0.00 km2. There is one unique zip code in Plainfield, Ohio and it is 43836. The area code(s) for Plainfield is 740/220.
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