25 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 61614 | Peoria | 28,399 |
| 61604 | Peoria | 28,220 |
| 61615 | Peoria | 23,167 |
| 61603 | Peoria | 15,789 |
| 61605 | Peoria | 13,776 |
| 61525 | Dunlap | 11,543 |
| 61607 | Peoria | 10,522 |
| 61523 | Chillicothe | 10,356 |
| 61606 | Peoria | 7,232 |
| 61616 | Peoria Heights | 5,890 |
| 61559 | Princeville | 3,845 |
| 61547 | Mapleton | 3,835 |
| 61528 | Edwards | 3,435 |
| 61536 | Hanna City | 3,207 |
| 61517 | Brimfield | 3,196 |
| 61529 | Elmwood | 2,730 |
| 61533 | Glasford | 2,363 |
| 61569 | Trivoli | 1,010 |
| 61602 | Peoria | 862 |
| 61526 | Edelstein | 808 |
| 61625 | Peoria | 438 |
| 61451 | Laura | 225 |
| 61552 | Mossville | 220 |
| 61539 | Kingston Mines | 150 |
| 61562 | Rome | 92 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 25 ZCTAs in Peoria County, Illinois (US Census).