This table ranks all 15 ZIP codes in the Sterling, IL MSA by estimated 2022 population, from highest to lowest.
| # | ZIP Code | Place Name | Population (2022) |
|---|---|---|---|
| 1 | ZIP 61021 | Dixon | 22,593 |
| 2 | ZIP 61081 | Sterling | 21,138 |
| 3 | ZIP 61071 | Rock Falls | 13,766 |
| 4 | ZIP 61270 | Morrison | 7,096 |
| 5 | ZIP 61252 | Fulton | 5,424 |
| 6 | ZIP 61064 | Polo | 3,898 |
| 7 | ZIP 61277 | Prophetstown | 2,978 |
| 8 | ZIP 61250 | Erie | 2,713 |
| 9 | ZIP 61283 | Tampico | 1,422 |
| 10 | ZIP 61014 | Chadwick | 1,064 |
| 11 | ZIP 61230 | Albany | 932 |
| 12 | ZIP 61261 | Lyndon | 644 |
| 13 | ZIP 61251 | Fenton | 382 |
| 14 | ZIP 61243 | Deer Grove | 277 |
| 15 | ZIP 61037 | Galt | 105 |