Whiteside County, Illinois ZIP Codes
- ZIP records
12 - Cities represented
12 - Sum of listed ZIP population estimates
56,250
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 | 61081 | Sterling | 20,844 |
| 2 | 61071 | Rock Falls | 13,581 |
| 3 | 61270 | Morrison | 6,912 |
| 4 | 61252 | Fulton | 5,437 |
| 5 | 61277 | Prophetstown | 3,054 |
| 6 | 61250 | Erie | 2,781 |
| 7 | 61283 | Tampico | 1,269 |
| 8 | 61230 | Albany | 1,039 |
| 9 | 61261 | Lyndon | 656 |
| 10 | 61251 | Fenton | 377 |
Cities in Whiteside County
ZIP Directory
- ZIP 61037
- ZIP 61071
- ZIP 61081
- ZIP 61230
- ZIP 61243
- ZIP 61250
- ZIP 61251
- ZIP 61252
- ZIP 61261
- ZIP 61270
- ZIP 61277
- ZIP 61283
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.