Zip Code 20855 — Derwood, MD
20855 is a ZIP Code associated with Derwood, MD, located within Montgomery. 20855 ranks #26 out of 48 ZIP codes in Montgomery County by population (and #140 out of 477 in MD). The area supports an estimated population of 17,279 residents across Data Pending housing units, with a population density of 510.3 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (39.137020, -77.131970)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 20855 |
| Primary City | Derwood |
| State / Province | MD |
| County | Montgomery |
| Total Population | 17,279 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 510.3 people/sq mi |
| Timezone | America/New_York |
How 20855 Compares
| Metric | ZIP 20855 | Montgomery County | MD State Average |
|---|
| Population | 17,279 | 1,076,754 (Total) | 6,205,597 (Total) |
| Average ZIP Income | Data Pending | N/A | N/A |
| Population Density | 510.3 /sq mi | -- | -- |
| County Pop Rank | #26 of 48 | -- | -- |
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 →