Hancock County, Illinois ZIP codes
17 ZIP codes are in Hancock County, plus 4 that cross in from neighboring counties.
- ZIP codes
- 17
- Population in these ZIPs
- 18,420
- Avg. median income
- $66,200population-weighted
- Cities & towns
- 17
Click anywhere on the map to see which ZIP code it's in.
ZIP codes in Hancock County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 61450 | La Harpe | 1,812 | $59,688 | $101,300 |
| 62311 | Augusta | 872 | $47,794 | $101,100 |
| 62313 | Basco | 382 | $108,646 | $133,400 |
| 62316 | Bowen | 705 | $61,094 | $84,000 |
| 62321 | Carthage | 3,576 | $76,825 | $124,800 |
| 62329 PO Box | Colusa | — | — | — |
| 62330 | Dallas City | 1,472 | $61,042 | $95,300 |
| 62334 | Elvaston | 163 | $38,750 | $126,800 |
| 62336 | Ferris | 84 | $43,125 | $77,100 |
| 62341 | Hamilton | 3,433 | $62,262 | $116,300 |
| 62354 | Nauvoo | 1,447 | $72,788 | $158,600 |
| 62358 | Niota | 525 | $62,216 | $127,300 |
| 62367 | Plymouth | 1,294 | $58,000 | $111,400 |
| 62373 | Sutter | 225 | $110,568 | $139,900 |
| 62374 | Tennessee | 216 | $78,571 | $81,700 |
| 62379 | Warsaw | 1,854 | $62,200 | $115,300 |
| 62380 | West Point | 360 | $75,000 | $82,500 |
ZIP codes partly in Hancock County
These ZIP codes are mostly in a neighboring county but cover part of Hancock County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 61420 | Blandinsville | McDonough County | 968 | $69,375 | $93,200 |
| 62326 | Colchester | McDonough County | 2,236 | $65,000 | $99,900 |
| 62349 | Loraine | Adams County | 517 | $67,981 | $87,700 |
| 62351 | Mendon | Adams County | 1,928 | $77,298 | $208,600 |
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 Hancock County
Nearby counties
Frequently asked questions
How many ZIP codes are in Hancock County, Illinois?
17 ZIP codes are mainly in Hancock County, and 4 more ZIP codes from neighboring areas reach partly into it.
What cities are in Hancock County?
ZIP codes in Hancock County use the city names Augusta, Basco, Bowen, Carthage, Colusa, Dallas City, Elvaston, Ferris, Hamilton, La Harpe, Nauvoo and Niota and others.