This table ranks all 22 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 61068 | Rochelle | 14,862 |
| 4 | ZIP 61071 | Rock Falls | 13,766 |
| 5 | ZIP 61342 | Mendota | 8,389 |
| 6 | ZIP 61310 | Amboy | 3,556 |
| 7 | ZIP 60518 | Earlville | 3,514 |
| 8 | ZIP 61376 | Walnut | 1,960 |
| 9 | ZIP 61031 | Franklin Grove | 1,745 |
| 10 | ZIP 61006 | Ashton | 1,460 |
| 11 | ZIP 61353 | Paw Paw | 1,238 |
| 12 | ZIP 61330 | La Moille | 1,222 |
| 13 | ZIP 61349 | Ohio | 1,054 |
| 14 | ZIP 61367 | Sublette | 902 |
| 15 | ZIP 60530 | Lee | 901 |
| 16 | ZIP 60553 | Steward | 666 |
| 17 | ZIP 61318 | Compton | 620 |
| 18 | ZIP 61378 | West Brooklyn | 493 |
| 19 | ZIP 61042 | Harmon | 428 |
| 20 | ZIP 61243 | Deer Grove | 277 |
| 21 | ZIP 61324 | Eldena | 85 |
| 22 | ZIP 61057 | Nachusa | 67 |