County ZIP codes · Illinois · FIPS 17129
Menard County, IL ZIP Codes
Menard County, Illinois has 9 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 8 residential and 1 for PO boxes or a single organization. 5 of the residential ones lie mainly in Menard County and 3 mainly in a neighboring county; 6 cross the county line. Median household income ranges from $77,538 in 62642 (Greenview) to $121,429 in 62693 (Williamsville) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Menard County?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
How different are its ZIP codes?
The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $84,267 and $102,917.
They carry 8 postal town names: Petersburg, Athens, Pleasant Plains, Williamsville, Greenview, Tallula, Middletown, Oakford.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 8 residential ZIP codes in Menard County
5 ZIP codes lie mainly in Menard County; 3 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 62675 | Petersburg | 6,170 | 54 | $84k | $204k | 98% |
| 62613 | Athens | 3,598 | 57 | $87k | $201k | 85% |
| 62642 | Greenview | 1,396 | 19 | $78k | $113k | 100% |
| 62688 | Tallula | 678 | 15 | $74k | $133k | 100% |
| 62673 | Oakford | 361 | 13 | $68k | $153k | 69% |
Partly in Menard County
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).
Which ZIP codes cross the county line?
6 ZIP codes of Menard County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Menard | Elsewhere |
|---|---|---|
| 62675 | 98% | Cass County 2% |
| 62613 | 85% | Sangamon County 7%; Logan County 7% |
| 62677 | 2% | Sangamon County 98% |
| 62693 | 3% | Sangamon County 61%; Logan County 37% |
| 62666 | 23% | Logan County 77% |
| 62673 | 69% | Cass County 31% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
PO Box and single-organization ZIP codes
| ZIP | Postal name |
|---|---|
| 62659 | Lincoln'S New Salem |
Source: GeoNames postal codes (CC BY 4.0).
Which first three digits do Menard County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Every ZIP code of Menard County starts with 626.
| Prefix | Sectional center | Here | All codes |
|---|---|---|---|
| 626 | Springfield, IL (SCF 625) | 9 | 62 |
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.