San Mar Flag

San Mar

County Seat:
No
Area (mi²):
0.466
State:
Maryland

San Mar is a CDP located in Washington County, Maryland. San Mar has a 2026 population of 444. San Mar is currently growing at a rate of 0.68% annually and its population has decreased by 0% since the most recent census, which recorded a population of 0 in 2020.

The median age in San Mar is 79.4 years: 71.5 years for males, and 79.9 years for females. For every 100 females there are 54.5 males.

444
Total Population
953
Density (mi²)
3 0.68%
Growth

San Mar Population

San Mar Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
202644430.68%
202544140.92%

Median Age

Overall: 79.4 years
Female: 79.9 years
Male: 71.5 years

San Mar Adults

There are 298 adults, (228 of whom are seniors) in San Mar.

Sex Ratio

Female: 198 (64.7%)
Male: 108 (35.3%)

Demographics

The racial composition of San Mar includes 91.5% White, 6.86% Black or African American, and smaller percentages for Two or more races and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White28091.5%
Black or African American216.86%
Two or more races51.63%
Race
Population ↓
Percentage (of total)
Two or more races51.63%
Race
Population ↓
Percentage (of total)
White28091.5%
Black or African American216.86%

San Mar Marital Status

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)