Harrison County, Iowa Zip Codes by Population (2024)

The most populated Zip Code in Harrison County, Iowa is 51555, located in Missouri Valley. * 2024 populations estimated based on the latest ACS 5-year data.

Zip Code
City
Population
51555Missouri Valley4,858
51546Logan3,067
51579Woodbine2,116
51529Dunlap1,992
51557Mondamin834
51563Persia737
51564Pisgah479
51556Modale359
51545Little Sioux271
51550Magnolia137