Zip Code 11901 — Riverhead, NY
11901 is a ZIP Code associated with Riverhead, NY, located within Suffolk. 11901 ranks #10 out of 108 ZIP codes in Suffolk County by population (and #189 out of 1,826 in NY). The area supports an estimated population of 33,091 residents across Data Pending housing units, with a population density of 225.3 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (40.924240, -72.646970)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 11901 |
| Primary City | Riverhead |
| State / Province | NY |
| County | Suffolk |
| Total Population | 33,091 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 225.3 people/sq mi |
| Timezone | America/New_York |
How 11901 Compares
| Metric | ZIP 11901 | Suffolk County | NY State Average |
|---|
| Population | 33,091 | 1,476,044 (Total) | 19,771,902 (Total) |
| Average ZIP Income | Data Pending | N/A | N/A |
| Population Density | 225.3 /sq mi | -- | -- |
| County Pop Rank | #10 of 108 | -- | -- |
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 →