ZIP codes in Champaign County
39 ZIPs touch Champaign County, Illinois. The blue dashed line is the county border; orange ZIPs reach into it.
39
ZIP codes
17
cross the county line
223,541
people in these ZIPs
102
counties in IL
Most people
Champaign County ZIP list
More counties in Illinois
- Boone County15
- Brown County5
- Bureau County31
- Calhoun County8
- Carroll County11
- Cass County9
- Christian County20
- Clark County11
- Clay County13
- Clinton County18
- Coles County17
- Cook County228
Questions people actually ask
How many ZIP codes are in Champaign County, Illinois?
39 ZIP codes reach into Champaign County, including 4 PO Box or single-address ZIPs placed by the town they serve. 17 of them are only partly in the county and also cover a neighboring county.
Which ZIP code in Champaign County has the most people?
61820 (Champaign) has about 40,599 residents, the most of any ZIP touching Champaign County, in the Census Bureau’s ACS 2020–2024 estimates.
Can a ZIP code be in Champaign 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 Champaign 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.
Keep exploring
Updated 2026-11-10 · Where the data comes from