Johnston Zip Codes - Polk County IA

Johnston, IA Zip Code Map

Johnston, IA is a city located in Polk County, Iowa and has a land area of 23.69 square miles (61.36 km2). The water area for the city is 4.23 square miles or 10.96 km2. There is one unique zip code in Johnston, Iowa and it is 50131. The area code(s) for Johnston is 515.

Zip Codes for Johnston, IA (1)
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50131 Johnston Polk

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