Mercer County, Illinois ZIP Codes
- ZIP records
13 - Cities represented
13 - Sum of listed ZIP population estimates
16,648
Population sum includes positive estimates in these ZIP records; it is not an official county population.
Top ZIP Codes by Population
| Rank | ZIP Code | City | Population estimate |
|---|---|---|---|
| 1 | 61231 | Aledo | 4,962 |
| 2 | 61281 | Sherrard | 2,520 |
| 3 | 61272 | New Boston | 1,437 |
| 4 | 61412 | Alexis | 1,392 |
| 5 | 61486 | Viola | 1,330 |
| 6 | 61465 | New Windsor | 1,192 |
| 7 | 61279 | Reynolds | 1,015 |
| 8 | 61260 | Joy | 737 |
| 9 | 61263 | Matherville | 657 |
| 10 | 61476 | Seaton | 551 |
Cities in Mercer County
- Aledo
- Alexis
- Joy
- Keithsburg
- Matherville
- New Boston
- New Windsor
- North Henderson
- Preemption
- Reynolds
- Seaton
- Sherrard
- Viola
ZIP Directory
- ZIP 61231
- ZIP 61260
- ZIP 61263
- ZIP 61272
- ZIP 61276
- ZIP 61279
- ZIP 61281
- ZIP 61412
- ZIP 61442
- ZIP 61465
- ZIP 61466
- ZIP 61476
- ZIP 61486
Browse all ZIP data for Illinois
Methodology: Records are grouped by the source file's listed county and state. Population sums add positive ZIP-level estimates and are not official county totals; city counts use distinct city labels in the source.