ZIP codes in Jennings County
14 ZIPs touch Jennings County, Indiana. The blue dashed line is the county border; orange ZIPs reach into it.
14
ZIP codes
11
cross the county line
75,630
people in these ZIPs
92
counties in IN
Most people
Jennings County ZIP list
More counties in Indiana
- Howard County15
- Huntington County9
- Jackson County10
- Jasper County13
- Jay County9
- Jefferson County11
- Johnson County12
- Knox County12
- Kosciusko County22
- LaGrange County13
- LaPorte County17
- Lake County33
Questions people actually ask
How many ZIP codes are in Jennings County, Indiana?
14 ZIP codes reach into Jennings County, including 1 PO Box or single-address ZIPs placed by the town they serve. 11 of them are only partly in the county and also cover a neighboring county.
Which ZIP code in Jennings County has the most people?
47274 (Seymour) has about 33,068 residents, the most of any ZIP touching Jennings County, in the Census Bureau’s ACS 2020–2024 estimates.
Can a ZIP code be in Jennings County and another county?
Yes. ZIP codes follow mail routes, not county lines. Rows marked with a percentage show how much of that ZIP’s land is in Jennings County. For one address, pin the exact spot on the ZIP finder to see its county.
Where does this list come from?
ZIP areas and their county overlaps come from the Census Bureau’s 2020 ZIP Code Tabulation Area to county relationship file. PO Box ZIPs have no area, so each is placed in the county of the ZIP area nearest the town it serves.
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Updated 2026-11-10 · Where the data comes from