Mount Ayr, IA is a city located in Ringgold County, Iowa and has a land area of 138.88 square miles (359.70 km2). The water area for the city is 0.86 square miles or 2.23 km2. There is one unique zip code in Mount Ayr, Iowa and it is 50854. The area code(s) for Mount Ayr is 641.
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