San Mar

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

San Mar is a CDP located in Washington County, Maryland. San Mar has a 2025 population of 345. San Mar is currently declining at a rate of -0.86% annually but its population has increased by 8.49% since the most recent census, which recorded a population of 318 in 2020.

The average household income in San Mar is $181,505 with a poverty rate of 20.81%. The median age in San Mar is 66.9 years: 62.7 years for males, and 79.1 years for females.

Demographics

The racial composition of San Mar includes 93.76% White, 5.31% Black or African American, and smaller percentages for Two or more races, Native American, Asian, Native Hawaiian or Pacific Islander, other race and multiracial populations.

Population by Race

White

Black or African American

Two or more races

Native American

Asian

Native Hawaiian or Pacific Islander

Other race

Race	Population	Percentage (of total)
White	406	93.76%
Black or African American	23	5.31%
Two or more races	4	0.92%
Native American	0	0%
Asian	0	0%
Native Hawaiian or Pacific Islander	0	0%
Other race	0	0%

San Mar Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

San Mar's average per capita income is $37,176. Household income levels show a median of $88,056. The poverty rate stands at 20.81%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.

Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.

Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.

Name	Median	Mean
Families	$108,906	$116,276
Married Families	$108,906	-
Households	$88,056	$181,505
Non Families	$55,313	$209,621

$37,176

Average Income

$88,056

Median Household Income

20.81%

Poverty Rate