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ZIP codes in Tazewell County

23 ZIPs touch Tazewell County, Illinois. The blue dashed line is the county border; orange ZIPs reach into it.

23

ZIP codes

9

cross the county line

147,840

people in these ZIPs

102

counties in IL

Most people

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Tazewell County ZIP list

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Questions people actually ask

How many ZIP codes are in Tazewell County, Illinois?

23 ZIP codes reach into Tazewell County, including 2 PO Box or single-address ZIPs placed by the town they serve. 9 of them are only partly in the county and also cover a neighboring county.

Which ZIP code in Tazewell County has the most people?

61554 (Pekin) has about 40,577 residents, the most of any ZIP touching Tazewell County, in the Census Bureau’s ACS 2020–2024 estimates.

Can a ZIP code be in Tazewell 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 Tazewell 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