There are 5 zip codes in Montgomery County, Iowa. The most populated is 51566, located in Red Oak. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
515666,764Red Oak
508641,745Villisca
515731,099Stanton
51532685Elliott
5084764Grant
showing: 5 rows

Zip Codes in Montgomery County, Iowa by Population (2024)