There are 8 zip codes in Decatur County, Iowa. The most populated is 50140, located in Lamoni. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
501402,973Lamoni
501442,579Leon
50065608Davis City
50264493Weldon
50108438Grand River
50103400Garden Grove
50067265Decatur
50262174Van Wert
showing: 8 rows

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