St. Mary's County, Maryland

Interactive maps and statistics for St. Mary's County, Maryland: income, age, education, housing, health and more, set beside Maryland and the United States.

St. Mary's County, Maryland is among the highest in the country for median household income (56th of 3,221 counties), and among the highest in the country for median gross rent (117th of 3,215 counties).

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Key figures

Statistic	St. Mary's County, Maryland	Maryland	United States	Rank
Total Population	115,126	6,206,011	334,922,499	548th of 3,222
Median Household Income	$119,446	$103,678	$80,734	56th of 3,221
Median Age	37.2	39.4	38.9	2719th of 3,222
Bachelor's Degree or Higher	36.5%	43.4%	35.7%	399th of 3,222
Median Home Value	$407,600	$419,900	$332,700	275th of 3,217
Median Gross Rent	$1,747	$1,705	$1,413	117th of 3,215
Poverty Rate	8.0%	9.4%	12.5%	2854th of 3,222
Unemployment Rate	3.6%	4.9%	5.2%	2173rd of 3,222
Population per Square Mile	321.1	639.1	n/a	475th of 3,222
Foreign Born	4.3%	16.6%	14.1%	1131st of 3,222
Life Expectancy	77.5	n/a	n/a	937th of 3,062
Homeownership Rate	73.2%	67.6%	65.2%	1841st of 3,222
Average Commute Time	29.9	31.1	26.4	527th of 3,221
Worked from Home	17.5%	19.3%	15.1%	236th of 3,222
Uninsured	5.8%	n/a	n/a	2868th of 3,134
Married-Couple Households	53.8%	46.2%	46.9%	732nd of 3,222
Broadband Access	90.1%	n/a	n/a	365th of 3,135

Rank is among all US counties with published data, counting down from the highest value. Figures come from the American Community Survey, CDC, BLS, BEA and other federal sources. Open the map for 1,147 statistics and the year and margin of error behind each one.

Race and ethnicity in St. Mary's County, Maryland

Statistic	St. Mary's County, Maryland	Maryland	United States
White (non-Hispanic)	70.3%	46.6%	57.4%
Hispanic or Latino (any race)	6.1%	12.5%	19.3%
Black (non-Hispanic)	14.6%	28.9%	11.9%
Asian (non-Hispanic)	2.6%	6.5%	5.9%
Two or More Races (non-Hispanic)	5.9%	4.6%	4.3%
American Indian & Alaska Native (non-Hispanic)	0.1%	0.1%	0.5%
Native Hawaiian & Pacific Islander (non-Hispanic)	0.0%	0.0%	0.2%
Some Other Race (non-Hispanic)	0.5%	0.7%	0.6%
Diversity Index	47.7	67.7	61.4

Age in St. Mary's County, Maryland

Statistic	St. Mary's County, Maryland	Maryland	United States
Median Age	37.2	39.4	38.9
Under 18 %	23.9%	22.2%	22.0%
Age 18-24 %	8.6%	8.5%	9.1%
Age 25-34 %	14.0%	13.2%	13.7%
Age 35-44 %	13.9%	13.6%	13.2%
Age 45-64 %	25.5%	25.9%	24.8%
Age 65 and Over %	14.0%	16.7%	17.2%

Households and families in St. Mary's County, Maryland

Statistic	St. Mary's County, Maryland	Maryland	United States
Households	42,436	2,362,928	129,227,496
Average Household Size	2.7	2.6	2.5
Family Households	71.0%	65.0%	64.2%
Households with Children	36.0%	30.6%	29.5%
Single-Parent Families	17.2%	18.8%	17.3%
People Living Alone	23.1%	28.7%	28.7%
Never Married	32.5%	36.2%	34.4%

Income and poverty in St. Mary's County, Maryland

Statistic	St. Mary's County, Maryland	Maryland	United States
Per Capita Income	$53,417	$52,979	$44,673
Households Under $25,000	9.0%	11.2%	14.6%
Households $50,000 to $74,999	10.3%	12.8%	15.5%
Households $100,000 to $149,999	19.4%	18.9%	17.5%
Households $200,000 or More	23.5%	20.3%	13.4%
Poverty Rate	8.0%	9.4%	12.5%
Below 200% of Poverty	18.3%	21.0%	28.2%
SNAP Households	11.2%	11.2%	n/a

Housing in St. Mary's County, Maryland

Statistic	St. Mary's County, Maryland	Maryland	United States
Housing Units	46,385	2,560,784	143,775,355
Single-Family Detached Homes	72.5%	51.2%	61.3%
Buildings with 5+ Units	11.5%	22.6%	19.1%
Vacancy Rate	8.5%	7.7%	10.1%
Median Year Structure Built	1,992.0	1,979.0	1,980.0
Renter-Occupied	26.8%	32.4%	34.8%
Rent as % of Household Income	27.9%	30.8%	30.6%
Median Property Tax	$3,424	$4,093	n/a

Education in St. Mary's County, Maryland

Statistic	St. Mary's County, Maryland	Maryland	United States
Less than High School	7.3%	8.9%	10.4%
High School Graduate	27.1%	23.4%	26.0%
Some College or Associate Degree	29.1%	24.3%	27.9%
Bachelor's Degree	20.3%	22.7%	21.6%
Graduate or Professional Degree	16.2%	20.8%	14.1%

Work and commuting in St. Mary's County, Maryland

Statistic	St. Mary's County, Maryland	Maryland	United States
Labour Force Participation	68.5%	67.1%	63.5%
Drove Alone to Work	72.2%	64.7%	68.8%
Public Transit	0.9%	4.2%	3.2%
Walked to Work	2.8%	2.0%	2.4%
Commutes Under 15 Minutes	22.4%	18.3%	26.0%
Commutes Over an Hour	13.2%	12.7%	8.6%
Households Without a Car	3.2%	8.8%	n/a

Origins and language in St. Mary's County, Maryland

Statistic	St. Mary's County, Maryland	Maryland	United States
Born in State of Residence	48.4%	46.8%	57.3%
Naturalised Citizens	2.5%	9.1%	7.4%
Non-Citizens	1.8%	7.5%	6.8%
Speaks Only English at Home	92.7%	78.9%	77.7%
Speaks Spanish at Home	2.4%	9.6%	13.6%
Limited English Proficiency	5.6%	16.9%	16.7%

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