County · Illinois · United States
Mercer County ZIP codes
12 ZIP codes · 12 cities · FIPS 17131
Key facts
- State
- Illinois (IL)
- FIPS code
- 17131
- Population
- 15,619
- Median household income
- $71,710
- Median age
- 44.5
- Land area
- 561.2 sq mi (1,453.6 km²)
- Population density
- 28 / sq mi
- Area codes
- 309
Cities and ZIP codes in Mercer County (12)
| City | ZIP codes |
|---|---|
| Aledo | 61231 |
| Alexis | 61412 |
| Joy | 61260 |
| Keithsburg | 61442 |
| Matherville | 61263 |
| New Boston | 61272 |
| New Windsor | 61465 |
| North Henderson | 61466 |
| Preemption | 61276 |
| Seaton | 61476 |
| Sherrard | 61281 |
| Viola | 61486 |
About this page
County figures are Census county-level values (ACS 5-year); the ZIP list shows the ZIPs whose primary county this is — a ZIP on a border can also serve neighbouring counties.
Sources: U.S. Census Bureau (2020 county relationship file, ACS 5-year) · GeoNames. Methodology.