Middlefield, OH is a city located in Geauga County, Ohio and has a land area of 74.68 square miles (193.42 km2). The water area for the city is 0.33 square miles or 0.85 km2. There is one unique zip code in Middlefield, Ohio and it is 44062. The area code(s) for Middlefield is 440.
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