16 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 62301 | Quincy | 30,987 |
| 62305 | Quincy | 19,077 |
| 62320 | Camp Point | 2,431 |
| 62347 | Liberty | 2,172 |
| 62351 | Mendon | 2,026 |
| 62360 | Payson | 1,540 |
| 62324 | Clayton | 1,393 |
| 62338 | Fowler | 1,109 |
| 62376 | Ursa | 1,073 |
| 62339 | Golden | 1,004 |
| 62349 | Loraine | 678 |
| 62325 | Coatsburg | 547 |
| 62365 | Plainville | 421 |
| 62348 | Lima | 240 |
| 62346 | La Prairie | 135 |
| 62359 | Paloma | 104 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 16 ZCTAs in Adams County, Illinois (US Census).