St. Mary's County, MD

County

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2023 Population
114,372
0.49% 1-year growth
2023 Median Age
37
0% 1-year change
2023 Poverty Rate
7.45%
1.89% 1-year decrease
2023 Median Household Income
$114,580
0.802% 1-year growth
2023 Median Property Value
$390,900
3.71% 1-year growth
2023 Employed Population
56,954
0.614% 1-year decline

About

In the year of 2023, St. Mary's County, MD had a population of 114k people with a median age of 37 and a median household income of $114,580. Between 2022 and 2023 the population of St. Mary's County, MD grew from 113,814 to 114,372, a 0.49% increase and its median household income grew from $113,668 to $114,580, a 0.802% increase.

The 5 largest ethnic groups in St. Mary's County, MD are White (Non-Hispanic) (71%), Black or African American (Non-Hispanic) (14.6%), Two Races Excluding Other, & Three or More Races (Non-Hispanic) (4.23%), Asian (Non-Hispanic) (2.54%), and Two Races Including Other (Hispanic) (2.04%).

None of the households in St. Mary's County, MD reported speaking a non-English language at home as their primary shared language. This does not consider the potential multi-lingual nature of households, but only the primary self-reported language spoken by all members of the household.

98.2% of the residents in St. Mary's County, MD are U.S. citizens.

In 2023, the median property value in St. Mary's County, MD was $390,900, and the homeownership rate was 72.6%.

Most people in St. Mary's County, MD drove alone to work, and the average commute time was 30.4 minutes. The average car ownership in St. Mary's County, MD was 2 cars per household.

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Population & Diversity

St. Mary's County, MD is home to a population of 114k people, from which 98.2% are citizens. As of N/A, NaNk% of St. Mary's County, MD residents were born outside of the country (N/A people).

In 2023, there were 4.85 times more White (Non-Hispanic) residents (81.2k people) in St. Mary's County, MD than any other race or ethnicity. There were 16.7k Black or African American (Non-Hispanic) and 4.84k Two Races Excluding Other, & Three or More Races (Non-Hispanic) residents, the second and third most common ethnic groups.

Population & Diversity

Citizenship

98.2%
2023 Citizenship
97.6%
2022 Citizenship

As of 2023, 98.2% of St. Mary's County, MD residents were US citizens, which is higher than the national average of 93.4%. In 2022, the percentage of US citizens in St. Mary's County, MD was 97.6%, meaning that the rate of citizenship has been increasing.

The following chart shows US citizenship percentages in St. Mary's County, MD compared to that of it's neighboring and parent geographies.

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Diversity

Race and Ethnicity

The 3 largest ethnic groups in St. Mary's County, MD
  1. White (Non-Hispanic)
    81.2k ± 806
  2. Black or African American (Non-Hispanic)
    16.7k ± 576
  3. Two Races Excluding Other, & Three or More Races (Non-Hispanic)
    4.84k ± 636
5.95%
Hispanic Population
6.81k people

In 2023, there were 4.85 times more White (Non-Hispanic) residents (81.2k people) in St. Mary's County, MD than any other race or ethnicity. There were 16.7k Black or African American (Non-Hispanic) and 4.84k Two Races Excluding Other, & Three or More Races (Non-Hispanic) residents, the second and third most common ethnic groups.

5.95% of the people in St. Mary's County, MD are hispanic (6.81k people).

The following chart shows the 8 races represented in St. Mary's County, MD as a share of the total population.

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Global Diversity

The PUMS dataset is not available at the County level, so we are showing data for Maryland.
Most Common Origin
  1. El Salvador
    130,412 ± 8,772 people
  2. India
    62,394 ± 6,102 people
  3. Nigeria
    47,653 ± 5,339 people

In 2023, the most common birthplace for the foreign-born residents of Maryland was El Salvador, the natal country of 130,412 Maryland residents, followed by India with 62,394 and Nigeria with 47,653.

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Military

Veterans

Most Common Service Period
  1. Gulf War (2001-)
    5,220 ± 650
  2. Gulf War (1990s)
    2,867 ± 499
  3. Vietnam
    2,072 ± 348

St. Mary's County, MD has a large population of military personnel who served in Gulf War (2001-), 1.82 times greater than any other conflict.

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Economy

The economy of St. Mary's County, MD employs 57k people. In 2023, the largest industries in St. Mary's County, MD were N/A, and the highest paying industries were Public Administration ($117,870), Utilities ($110,391), and Professional, Scientific, & Technical Services ($92,430).

Employment

Occupations

57k
2023 Value
± 2,151
−0.614%
1 Year decline
± 5.23%

From 2022 to 2023, employment in St. Mary's County, MD declined at a rate of −0.614%, from 57.3k employees to 57k employees.

The most common job groups, by number of people living in St. Mary's County, MD, are Management Occupations (7,066 people), Office & Administrative Support Occupations (5,593 people), and Business & Financial Operations Occupations (5,216 people). This chart illustrates the share breakdown of the primary jobs held by residents of St. Mary's County, MD.

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Unemployment Insurance Claims

Data is only available at the state level. Showing data for Maryland.

This chart shows weekly unemployment insurance claims in Maryland (not-seasonally adjusted) compared with the four states with the most similar impact.

The most recent data point uses Advance State Claims data, which can be revised in subsequent weeks.

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Industries

Employment by Industries

57k
2023 Value
± 2,151
−0.614%
1 Year decline
± 5.23%

From 2022 to 2023, employment in St. Mary's County, MD declined at a rate of −0.614%, from 57.3k employees to 57k employees.

The most common employment sectors for those who live in St. Mary's County, MD, are N/A. This chart shows the share breakdown of the primary industries for residents of St. Mary's County, MD, though some of these residents may live in St. Mary's County, MD and work somewhere else. Census data is tagged to a residential address, not a work address.

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Median Earnings by Industry

$81,930
Median earning men ± $3,686
$52,316
Median earning women ± $4,307

The industries with the best median earnings for men in 2023 are Public Administration ($121,132), Professional, Scientific, & Management, & Administrative & Waste Management Services ($100,029), and Manufacturing ($95,250).

The industries with the best median earnings for women in 2023 are Public Administration ($109,253), Professional, Scientific, & Management, & Administrative & Waste Management Services ($71,042), and Construction ($68,021).

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Establishments by Size

The visualization shows the distribution of establishments by industry and by size according to the number of employees.

The visualization shows the number of establishments and its share across establishment sizes.

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Civics

In the 2024 presidential election, the popular vote in Maryland went to Kamala Harris with 62.6% of the vote. The runner-up was Donald J. Trump (34.1%), followed by Jill Stein (1.09%).

N/A are the senators currently representing the state of N/A. In the United States, senators are elected to 6-year terms with the terms for individual senators staggered.

Maryland is currently represented by 8 members in the U.S. house, and members of the House of Representives are elected to 2-year terms.

Presidential Elections

Voting results are not available for St. Mary's County, MD. Showing the available data for Maryland.
2024 Election Results
  1. Kamala Harris (62.6%)
    Democratic Party
  2. Donald J. Trump (34.1%)
    Republican Party
  3. Jill Stein (1.09%)
    Green Party

In the 2024 presidential election, the popular vote in Maryland went to Kamala Harris with 62.6% of the vote. The runner-up was Donald J. Trump (34.1%), followed by Jill Stein (1.09%).

The following chart shows the popular vote results in Maryland for each registered party from 1976 to 2024.

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Senator Elections

US Senators from N/A

Senatorial voting results are only available at the state level. Showing data for undefined.
Senator from N/AN/A
  1. N/AN/A
    N/A
  2. N/AN/A
    N/A

N/A are the senators currently representing N/A.

In the United States, senators are elected to 6-year terms with the terms for individual senators staggered.

The following chart shows elected senators in N/A over time, excluding special elections, colored by their political party.

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US Representative Elections

US Representatives from Maryland

Maryland is currently represented by 8 members in the U.S. house.

Members of the House of Representives are elected to 2-year terms, and the following chart shows the how the members for Maryland have changed over time starting in 2008.

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Education

In 2023, universities in St. Mary's County, MD awarded 365 degrees. The student population of St. Mary's County, MD in 2023 is skewed towards women, with 625 male students and 962 female students.

Admissions & Enrollments

Applicants, Admissions & Enrolled

Measure

In 2023 in St. Mary's County, MD, the percentage of applicants admitted was 75.4%, while the percentage of admitted who enrolled was 18.9%. The number of students enrolled in 2023 was 1,587 (39.4% men and 60.6% women).

The line chart  shows the evolution of the percentage of applicants admitted, admitted who enrolled or the number of students enrolled according to the option selected in the upper button.

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Enrollments by Gender and Races

In 2023 there were 1,587 students enrolled in St. Mary's County, MD, 39.4% men and 60.6% women.

By race, the largest number of students enrolled was concentrated in White with 1,107 records, of which 60.5% were women and 39.5% men.

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Completions

Awarded Degrees over Time

The graph shows the evolution of awarded degrees by degrees. Under the paragraphs, the average number of awarded degrees by university in each degree is shown.

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Tuition

Average Net Price by Sector

Public, 4-year or above ($12,116) is the sector with the highest median state tuition in 2023.

Public, 4-year or above ($3,120) is the sector with the highest median state fee in 2023.

Public, 4-year or above ($900) is the sector with the highest average net price of books and supplies.

The graph shows the average net price by sector and year.

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Working Population

Educational Pyramid

Data is only available at the state level. Showing data for Maryland.
Measure

In 2023, 1.28% of men over 25 years of age had not completed any academic degree (no schooling), while 1.17% of women were in the same situation.

This visualization shows the gender distribution of the population according to the academic level reached.

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Educational Attainment

Data is only available at the state level. Showing data for Maryland.
Race

The most common educational levels obtained by the working population in 2023 were High School or Equivalent (1.2M), Bachelors Degree (1.04M), and Some college (926k).

This visualization illustrates the percentage distribution of the population according to the highest educational level reached. You can filter the data by race by using the selector above.

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Housing & Living

The median property value in St. Mary's County, MD was $390,900 in 2023, which is 1.29 times larger than the national average of $303,400. Between 2022 and 2023 the median property value increased from $376,900 to $390,900, a 3.71% increase. The homeownership rate in St. Mary's County, MD is 72.6%, which is higher than the national average of 65%.

People in St. Mary's County, MD have an average commute time of 30.4 minutes, and they drove alone to work. Car ownership in St. Mary's County, MD is approximately the same as the national average, with an average of 2 cars per household.

Median household income in St. Mary's County, MD is $114,580. In N/A, the tract with the highest Median Household Income in St. Mary's County, MD was Census Tract 8754, St. Mary's County, MD with a value of $146,016, followed by Census Tract 8757, St. Mary's County, MD and Census Tract 8752.01, St. Mary's County, MD, with respective values of $139,912 and $133,494.

In 2025, 13.1% of the population was living with severe housing problems in St. Mary's County, MD. From 2014 to 2025, the indicator declined 0.314%.

Housing

Property

$390,900
Median Property Value 2023
±$8,531
$30,325
Median Property Taxes
±$1,254

The following chart display owner-occupied housing units distributed between a series of property tax buckets compared to the national averages for each bucket. In St. Mary's County, MD the largest share of households pay taxes in the $3k+ range.

The chart underneath the paragraph shows the property taxes in St. Mary's County, MD compared to it's parent and neighbor geographies.

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Rent vs Own

72.6%
Homeownership
2023
67.4%
Homeowners with Mortgage
2023

In 2023, 72.6% of the housing units in St. Mary's County, MD were occupied by their owner. This percentage grew from the previous year's rate of 72.5%.

This chart shows the percentage of owner in St. Mary's County, MD compared it's parent and neighboring geographies.

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Equity

Income by Location

Use the dropdown to filter by race/ethnicity.
Race/Ethnicity
Highest Median Household Income (Total)
  1. Census Tract 8754, St. Mary's County, MD
  2. Census Tract 8757, St. Mary's County, MD
  3. Census Tract 8752.01, St. Mary's County, MD

In N/A, the tract with the highest Median Household Income (Total) in St. Mary's County, MD was Census Tract 8754, St. Mary's County, MD with a value of $146,016, followed by Census Tract 8757, St. Mary's County, MD and Census Tract 8752.01, St. Mary's County, MD, with respective values of $139,912 and $133,494.

The following map shows all of the tracts in St. Mary's County, MD colored by their Median Household Income (Total).

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Household Income

Please note that the buckets used in this visualization were not evenly distributed by ACS when publishing the data.
$114,580
Median Household Income
± $4,177
41.7k
Number of Households
± 1,628

In 2023, the median household income of the 41.7k households in St. Mary's County, MD grew to $114,580 from the previous year's value of $113,668.

The following chart displays the households in St. Mary's County, MD distributed between a series of income buckets compared to the national averages for each bucket. The largest share of households have an income in the $200k+ range.

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Wage Distribution

The closest comparable wage GINI for St. Mary's County, MD is from Maryland.
0.451
2023 Wage GINI in Maryland
0.454
2022 Wage GINI in Maryland

In 2023, the income inequality in Maryland was 0.451 according to the GINI calculation of the wage distribution. Income inequality had a 0.683% decline from 2022 to 2023, which means that wage distribution grew somewhat more even. The GINI for Maryland was lower than than the national average of 0.476. In other words, wages are distributed more evenly in Maryland in comparison to the national average.

This chart shows the number of workers in Maryland across various wage buckets compared to the national average.

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Transportation

Commuter Transportation

Most Common Commute in 2023
  1. Drove Alone (75%)
  2. Worked At Home (15.3%)
  3. Carpooled (5.39%)

In 2023, 75% of workers in St. Mary's County, MD drove alone to work, followed by those who worked at home (15.3%) and those who carpooled to work (5.39%).

The following chart shows the number of households using each mode of transportation over time, using a logarithmic scale on the y-axis to help better show variations in the smaller means of commuting.

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Commute Time

30.4 minutes
Average Travel Time

Using averages, employees in St. Mary's County, MD have a longer commute time (30.4 minutes) than the normal US worker (26.6 minutes). Additionally, 7.76% of the workforce in St. Mary's County, MD have "super commutes" in excess of 90 minutes.

The chart below shows how the median household income in St. Mary's County, MD compares to that of it's neighboring and parent geographies.

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Car Ownership

2 cars
Average Number

The following chart displays the households in St. Mary's County, MD distributed between a series of car ownership buckets compared to the national averages for each bucket. The largest share of households in St. Mary's County, MD have 2 cars.

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Poverty

Severe Housing Problems

In 2025, 13.1% of the population was living with severe housing problems in St. Mary's County, MD. From 2014 to 2025, the indicator declined 0.314%.

The graph shows the trend of the percentage of the population living with severe housing problems.

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Poverty & Diversity

7.45% of the population for whom poverty status is determined in St. Mary's County, MD (8.34k out of 112k people) live below the poverty line, a number that is lower than the national average of 12.4%. The largest demographic living in poverty are Females 25 - 34, followed by Females 45 - 54 and then Females 18 - 24.

The most common racial or ethnic group living below the poverty line in St. Mary's County, MD is White, followed by Black and Two Or More.

The Census Bureau uses a set of money income thresholds that vary by family size and composition to determine who classifies as impoverished. If a family's total income is less than the family's threshold than that family and every individual in it is considered to be living in poverty.

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Children in Poverty

In 2025, 10.5% of the children was living in poverty in St. Mary's County, MD. From 2014 to 2025, the indicator declined 1.6%.

The graph shows the trend of the percentage of the children living in poverty.

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Security

Crimes & Accidents

Indicator

In 2022, the number of reported violent crimes offenses per 100,000 population was 221 in St. Mary's County, MD. From 2014 to 2022, the indicator declined 64.8 per 100,000 population.

The graph shows the trend in the number of reported violent crimes offenses per 100,000 population.

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Health

96.3% of the population of St. Mary's County, MD has health coverage, with 51.5% on employee plans, 13.5% on Medicaid, 8.71% on Medicare, 15.2% on non-group plans, and 7.36% on military or VA plans.

Primary care physicians in N/A see N/A patients per year on average, which represents a N/A N/A from the previous year (N/A patients). Compare this to dentists who see N/A patients per year, and mental health providers who see N/A patients per year.

By gender, of the total number of insured persons, N/A were men and N/A were women.

Coverage

Patient to Clinician Ratios

N/A to 1
Patient to Primary Care Physician Ratio in N/A

Primary care physicians in N/A see an average of N/A patients per year. This represents a N/A N/A from the previous year (N/A patients).

The following chart shows how the number of patients seen by primary care physicians has been changing over time in N/A in comparison to its neighboring geographies.

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Health Care Diversity

In 2023, insured persons according to age ranges were distributed in 26.4% under 18 years, 20.8% between 18 and 34 years, 39.1% between 35 and 64 years, and 13.7% over 64 years.

By gender, of the total number of insured persons, N/A were men and N/A were women.

The following chart shows the number of people with health coverage by gender.

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Uninsured People

3.74%
Uninsured
51.5%
Employer Coverage
13.5%
Medicaid
8.71%
Medicare
15.2%
Non-Group
7.36%
Military or VA

Between 2022 and 2023, the percent of uninsured citizens in St. Mary's County, MD declined by 5.76% from 3.96% to 3.74%.

The following chart shows how the percent of uninsured individuals in St. Mary's County, MD changed over time compared with the percent of individuals enrolled in various types of health insurance.

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Health Indicators

Health Outcomes

Indicator

In 2025, the number of deaths among residents under age 18 per 100,000 population was 51.2 in St. Mary's County, MD.

The graphic shows the trend of the indicator in St. Mary's County, MD.

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Health Behaviors

Indicator

In 2025, the percentage of the adult population (age 18 and older) that reports a body mass index (BMI) greater than or equal to 30 kg/m2 (age-adjusted) was 35.2% in St. Mary's County, MD.

The graphic shows the trend of the indicator in St. Mary's County, MD.

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Clinical Care

Indicator

In 2025, the percentage of population under age 65 without health insurance was 5.34% in St. Mary's County, MD.

The graphic shows the trend of the indicator in St. Mary's County, MD.

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