Mason County, Illinois ZIP codes
8 ZIP codes are in Mason County, plus 3 that cross in from neighboring counties.
- ZIP codes
- 8
- Population in these ZIPs
- 10,735
- Avg. median income
- $61,300population-weighted
- Cities & towns
- 8
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ZIP codes in Mason County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 61532 | Forest City | 347 | $71,544 | $104,500 |
| 61567 | Topeka | 411 | $68,750 | $87,700 |
| 62617 | Bath | 524 | $56,667 | $69,000 |
| 62633 | Easton | 638 | $44,783 | $86,900 |
| 62644 | Havana | 4,615 | $57,689 | $91,200 |
| 62655 | Kilbourne | 594 | $56,750 | — |
| 62664 | Mason City | 2,922 | $70,509 | $124,800 |
| 62682 | San Jose | 684 | $60,125 | $109,900 |
ZIP codes partly in Mason County
These ZIP codes are mostly in a neighboring county but cover part of Mason County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 61546 | Manito | Tazewell County | 3,849 | $79,551 | $146,400 |
| 62627 | Chandlerville | Cass County | 1,006 | $63,235 | $96,800 |
| 62671 | New Holland | Logan County | 362 | $98,750 | $108,900 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities and towns in Mason County
Nearby counties
Frequently asked questions
How many ZIP codes are in Mason County, Illinois?
8 ZIP codes are mainly in Mason County, and 3 more ZIP codes from neighboring areas reach partly into it.
What cities are in Mason County?
ZIP codes in Mason County use the city names Bath, Easton, Forest City, Havana, Kilbourne, Mason City, San Jose and Topeka.