Zip Code 15557 — Rockwood, PA
15557 is a ZIP Code associated with Rockwood, PA, located within Somerset. 15557 ranks #6 out of 35 ZIP codes in Somerset County by population (and #771 out of 1,832 in PA). The area supports an estimated population of 3,323 residents across Data Pending housing units, with a population density of 14.3 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (39.927570, -79.209450)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 15557 |
| Primary City | Rockwood |
| State / Province | PA |
| County | Somerset |
| Total Population | 3,323 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 14.3 people/sq mi |
| Timezone | America/New_York |
How 15557 Compares
| Metric | ZIP 15557 | Somerset County | PA State Average |
|---|
| Population | 3,323 | 73,052 (Total) | 13,018,637 (Total) |
| Average ZIP Income | Data Pending | N/A | N/A |
| Population Density | 14.3 /sq mi | -- | -- |
| County Pop Rank | #6 of 35 | -- | -- |
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 →