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San Mar, MD

Census-designated place in Washington County, Maryland.

Population

306

Land area

0.5sq mi

People per sq mi

657

ZIP codes

0

San Mar and its ZIP codes

Full map

Local data for San Mar, MD

Counts from official public data

Economy and federal money

Jobs, pay, income and spending are for Washington County. PPP loans are for San Mar.

Details

Unemployment rate

3.9%

Aug 2026, -1.0 pts in a year

Average annual pay

$59,257

66,110 jobs, 2025

Income per person

$59,536

BEA, 2024

Federal spending

$1.2B

FY 2026, $7,506 per person

Washington County economyFederal spending

Environment and hazard risk

San Mar, MD, from FEMA, NOAA and EPA

Full report

Natural hazard risk

Relatively Low

Top: drought

Storm events since 1996

1,066

Countywide, mostly thunderstorm wind

Flood insurance policies

280

0.5% of homes, county

July high / Jan low

86° / 22°F

43.5 inches of rain a year

Hazards, floods and storm historyCheck a flood zone

Health statistics

Share of adults in San Mar, MD, CDC PLACES estimates

All 40 measures

Obesity

30.0%

U.S. 33.3% -3.3 pts

Diabetes

17.5%

U.S. 12.1% +5.4 pts

Smoking

8.4%

U.S. 12.8% -4.4 pts

Uninsured (18-64)

6.2%

U.S. 11.1% -4.9 pts

Cities near San Mar

NameDistanceLand area (sq mi)
MaplevilleCensus-designated place1.3 mi0.4
Mount LenaCensus-designated place1.3 mi1.3
Beaver CreekCensus-designated place1.8 mi1.1
BagtownCensus-designated place2.7 mi0.5
BoonsboroTown3.1 mi3.1
Mount AetnaCensus-designated place3.6 mi1.4
BreathedsvilleCensus-designated place4.2 mi0.4
FunkstownTown4.9 mi0.6
JugtownCensus-designated place5.1 mi0.3
MyersvilleTown5.2 mi1.2
RobinwoodCensus-designated place5.2 mi3.8
KeedysvilleTown5.5 mi0.8
TilghmantonCensus-designated place5.5 mi0.5
FairplayCensus-designated place5.7 mi1.2
PondsvilleCensus-designated place5.7 mi0.3
St. JamesCensus-designated place5.8 mi6

Frequently asked questions

What county is San Mar, MD in?
San Mar is in Washington County, Maryland.
What is the population of San Mar, MD?
About 306 people live in San Mar, based on American Community Survey 5-year estimates.
What cities are near San Mar?
Nearby places include Mapleville (1.3 mi), Mount Lena (1.3 mi), Beaver Creek (1.8 mi), Bagtown (2.7 mi), Boonsboro (3.1 mi).

Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023