There are 7 zip codes in Jefferson County, Iowa. The most populated is 52556, located in Fairfield. * 2024 populations estimated based on the latest ACS 5-year data.

CSV JSON
Zip Code
Population
City
5255611,647Fairfield
525401,230Brighton
525331,058Batavia
52635946Lockridge
52580726Packwood
52557587Fairfield
52567449Libertyville

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