Zip Code 21756 — Keedysville, MD
21756 is a ZIP Code associated with Keedysville, MD, located within Washington. 21756 ranks #9 out of 19 ZIP codes in Washington County by population (and #259 out of 477 in MD). The area supports an estimated population of 3,640 residents across Data Pending housing units, with a population density of 60.3 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (39.457580, -77.701180)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 21756 |
| Primary City | Keedysville |
| State / Province | MD |
| County | Washington |
| Total Population | 3,640 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 60.3 people/sq mi |
| Timezone | America/New_York |
How 21756 Compares
| Metric | ZIP 21756 | Washington County | MD State Average |
|---|
| Population | 3,640 | 159,858 (Total) | 6,205,597 (Total) |
| Average ZIP Income | Data Pending | N/A | N/A |
| Population Density | 60.3 /sq mi | -- | -- |
| County Pop Rank | #9 of 19 | -- | -- |
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 →