Zip Code 61277 — Prophetstown, IL
61277 is a ZIP Code associated with Prophetstown, IL, located within Whiteside. 61277 ranks #5 out of 12 ZIP codes in Whiteside County by population (and #567 out of 1,396 in IL). The area supports an estimated population of 3,054 residents across Data Pending housing units, with a population density of 8.8 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (41.604250, -89.932510)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 61277 |
| Primary City | Prophetstown |
| State / Province | IL |
| County | Whiteside |
| Total Population | 3,054 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 8.8 people/sq mi |
| Timezone | America/Chicago |
How 61277 Compares
| Metric | ZIP 61277 | Whiteside County | IL State Average |
|---|
| Population | 3,054 | 56,250 (Total) | 12,694,745 (Total) |
| Average ZIP Income | Data Pending | N/A | N/A |
| Population Density | 8.8 /sq mi | -- | -- |
| County Pop Rank | #5 of 12 | -- | -- |
Nearby ZIP Codes
Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →