Zip Code 20880 — Washington Grove, MD
20880 is a ZIP Code associated with Washington Grove, MD, located within Montgomery. 20880 ranks #40 out of 48 ZIP codes in Montgomery County by population (and #385 out of 477 in MD). The area supports an estimated population of 577 residents across Data Pending housing units, with a population density of 667.8 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (39.140770, -77.174560)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 20880 |
| Primary City | Washington Grove |
| State / Province | MD |
| County | Montgomery |
| Total Population | 577 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 667.8 people/sq mi |
| Timezone | America/New_York |
How 20880 Compares
| Metric | ZIP 20880 | Montgomery County | MD State Average |
|---|
| Population | 577 | 1,076,754 (Total) | 6,205,597 (Total) |
| Average ZIP Income | Data Pending | N/A | N/A |
| Population Density | 667.8 /sq mi | -- | -- |
| County Pop Rank | #40 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 →