Whiteside County, Illinois ZIP codes
12 ZIP codes are in Whiteside County, plus 3 that cross in from neighboring counties. It's part of the Sterling, IL micro area.
- ZIP codes
- 12
- Population in these ZIPs
- 56,250
- Avg. median income
- $67,900population-weighted
- Cities & towns
- 12
Click anywhere on the map to see which ZIP code it's in.
ZIP codes in Whiteside County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 61037 | Galt | 145 | $70,357 | $103,600 |
| 61071 | Rock Falls | 13,581 | $60,508 | $122,100 |
| 61081 | Sterling | 20,844 | $67,586 | $145,900 |
| 61230 | Albany | 1,039 | $62,344 | $168,800 |
| 61243 | Deer Grove | 155 | $148,309 | $172,700 |
| 61250 | Erie | 2,781 | $84,688 | $176,000 |
| 61251 | Fenton | 377 | $79,464 | $233,200 |
| 61252 | Fulton | 5,437 | $59,861 | $163,200 |
| 61261 | Lyndon | 656 | $64,375 | $123,300 |
| 61270 | Morrison | 6,912 | $80,867 | $173,200 |
| 61277 | Prophetstown | 3,054 | $70,363 | $171,400 |
| 61283 | Tampico | 1,269 | $64,063 | $130,600 |
ZIP codes partly in Whiteside County
These ZIP codes are mostly in a neighboring county but cover part of Whiteside County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 61014 | Chadwick | Carroll County | 1,067 | $69,329 | $152,700 |
| 61064 | Polo | Ogle County | 3,757 | $75,386 | $179,400 |
| 61254 | Geneseo | Henry County | 12,135 | $92,297 | $247,900 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities and towns in Whiteside County
Nearby counties
Frequently asked questions
How many ZIP codes are in Whiteside County, Illinois?
12 ZIP codes are mainly in Whiteside County, and 3 more ZIP codes from neighboring areas reach partly into it.
What cities are in Whiteside County?
ZIP codes in Whiteside County use the city names Albany, Deer Grove, Erie, Fenton, Fulton, Galt, Lyndon, Morrison, Prophetstown, Rock Falls, Sterling and Tampico.
What metro area is Whiteside County in?
Whiteside County is part of the Sterling, IL micropolitan statistical area.