Zip Code 20670 — Patuxent River, MD
20670 is a ZIP Code associated with Patuxent River, MD, located within St. Mary's. 20670 ranks #7 out of 0 ZIP codes in St. Mary's County by population (and #310 out of 477 in MD). The area supports an estimated population of 2,046 residents across Data Pending housing units, with a population density of 84.5 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (38.282400, -76.420310)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 20670 |
| Primary City | Patuxent River |
| State / Province | MD |
| County | St. Mary's |
| Total Population | 2,046 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 84.5 people/sq mi |
| Timezone | America/New_York |
How 20670 Compares
| Metric | ZIP 20670 | St. Mary's County | MD State Average |
|---|
| Population | 2,046 | N/A (Total) | 6,205,597 (Total) |
| Average ZIP Income | Data Pending | N/A | N/A |
| Population Density | 84.5 /sq mi | -- | -- |
| County Pop Rank | #7 of 0 | -- | -- |
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 →