Marengo, OH is a city located in Morrow County, Ohio and has a land area of 66.05 square miles (171.07 km2). The water area for the city is 0.07 square miles or 0.18 km2. There is one unique zip code in Marengo, Ohio and it is 43334. The area code(s) for Marengo is 419/567.
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