Mount Briar is a community in Washington County, Maryland, home to about 201 people across 0.6 square miles. It has no ZIP code of its own: it’s part of 21756.
Homes sold for a median of $204 per square foot in the three months ending August 2026, a balanced market.
Mostly Keedysville; part is in Mount Briar
Each card is that ZIP code’s whole market, including any part outside Mount Briar. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Mount Briar’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Washington Dulles International Airport (IAD)38 miles away |
|---|---|
| Closer regional airport | Hagerstown Regional Richard A Henson Field (HGR)18 miles away |
| Nearest city of 250,000+ | Washington, DC53 miles away |
| Nearest city of 1 million+ | Philadelphia, PA141 miles away |
Straight-line distances from the center of Mount Briar; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Mount Briar had 170 residents in the 2020 census, up 6% since 2010.
It’s the 448th largest of 527 towns in Maryland by population.
Washington County grew from 45,133 residents in 1900 to 154,705 in 2020.
Washington County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 86°F in summer, and winter lows average 21°F. About 43.6 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Sharpsburg 5 S, MD weather station (4 miles away).
61,729 jobs at 3,417 businesses in Washington County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
8 doctors and other health care providers list an office in Mount Briar.
Nearest hospitals
Providers with an office here
| Primary care doctors | 1 |
|---|---|
| Nurse practitioners and physician assistants | 3 |
| Mental health providers | 3 |
| Physical and occupational therapists | 1 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Grocery stores
Libraries
Museums
Counts are within about 1 mile of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
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Shares ZIP codes with Keedysville, Trego-Rohrersville Station, Rohrersville and Eakles Mill.
Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.