ZIP codes in Calhoun County
8 ZIPs touch Calhoun County, Illinois. The blue dashed line is the county border; orange ZIPs reach into it.
8
ZIP codes
1
cross the county line
4,991
people in these ZIPs
102
counties in IL
Most people
Calhoun County ZIP list
More counties in Illinois
- Adams County24
- Alexander County9
- Bond County12
- Boone County15
- Brown County5
- Bureau County31
- Carroll County11
- Cass County9
- Champaign County39
- Christian County20
- Clark County11
- Clay County13
Questions people actually ask
How many ZIP codes are in Calhoun County, Illinois?
8 ZIP codes reach into Calhoun County, including 1 PO Box or single-address ZIPs placed by the town they serve. 1 of them are only partly in the county and also cover a neighboring county.
Which ZIP code in Calhoun County has the most people?
62047 (Hardin) has about 1,548 residents, the most of any ZIP touching Calhoun County, in the Census Bureau’s ACS 2020–2024 estimates.
Can a ZIP code be in Calhoun 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 Calhoun 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