Ottumwa, IA is a city located in Wapello County, Iowa and has a land area of 225.34 square miles (583.63 km2). The water area for the city is 2.64 square miles or 6.84 km2. There is one unique zip code in Ottumwa, Iowa and it is 52501. The area code(s) for Ottumwa is 641.
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