ZIP codes in Menard County
9 ZIPs touch Menard County, Illinois. The blue dashed line is the county border; orange ZIPs reach into it.
9
ZIP codes
6
cross the county line
16,514
people in these ZIPs
102
counties in IL
Most people
Menard County ZIP list
More counties in Illinois
- Marshall County19
- Mason County11
- Massac County8
- McDonough County17
- McHenry County26
- McLean County40
- Mercer County18
- Monroe County10
- Montgomery County28
- Morgan County17
- Moultrie County11
- Ogle County27
Questions people actually ask
How many ZIP codes are in Menard County, Illinois?
9 ZIP codes reach into Menard County, including 1 PO Box or single-address ZIPs placed by the town they serve. 6 of them are only partly in the county and also cover a neighboring county.
Which ZIP code in Menard County has the most people?
62675 (Petersburg) has about 6,170 residents, the most of any ZIP touching Menard County, in the Census Bureau’s ACS 2020–2024 estimates.
Can a ZIP code be in Menard 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 Menard 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