St. Mary's County Summary

Life in St. Mary's County research summary. HomeSnacks has been researching the quality of life in St. Mary's County over the past eight years using Census data, FBI crime data, cost of living data, and other primary sources. Based on the most recently available data, we found the following about life in St. Mary's County:

  • The population in St. Mary's County is 114,372.

  • The median home value in St. Mary's County is $420,317.

  • The median income in St. Mary's County is $114,580.

  • The median rent in St. Mary's County is $1,692.

  • The unemployment rate in St. Mary's County is 3.8%.

  • The poverty rate in St. Mary's County is 7.4%.

  • The average high in St. Mary's County is 68.4° and there are 110.5 inches of rainfall annually.

Cities & Towns in St. Mary's County

List Of Cities & Towns in St. Mary's County

Lexington Park, MD Population 13,419

California, MD Population 13,223

Leonar, MD Population 4,712

Golden Beach, MD Population 3,953

Mechanicsville, MD Population 1,521

Charlotte Hall, MD Population 1,448

Piney Point, MD Population 1,171

Tall Timbers, MD Population 532

St. George Island, MD Population 38

Map Of St. Mary's County

St. Mary's County, MD Weather

  • The average high in St. Mary's County is 68.4°.

  • There are 91.24 nice days each year.

  • Expect an average of 110.5 inches of rain each year with 4.9 inches of snow.

  • There is an average of 5:18 hours of sun each day in St. Mary's County.

StatSt. Mary's County
Mean High68.4
Nice Days91.24
Rainfall110.5
Snowfall4.9
Sunny Hours5:18
68.4°
Average High
110.5
Inches of Rain

St. Mary's County Demographics

Population over time in St. Mary's County

The current population in St. Mary's County is 114,372. The population has increased 0.8% from 2019.

Year Population % Change
2023 113,209 0.0%
2022 113,182 0.8%
2021 112,290 -

Gender in St. Mary's County

  • St. Mary's County is 49.6% female with 56,688 female residents.

  • St. Mary's County is 50.4% male with 57,683 male residents.

Female
49.6% (56,688)
Male
50.4% (57,683)
Gender St. Mary's County MD USA
Female 49.6% 51.3% 50.5%
Male 50.4% 48.7% 49.5%

Race / Ethnicity in St. Mary's County

St. Mary's County is:

  • 71.0% White with 81,155 White residents.

  • 14.6% African American with 16,744 African American residents.

  • 0.1% American Indian with 69 American Indian residents.

  • 2.5% Asian with 2,908 Asian residents.

  • 0.0% Hawaiian with 0 Hawaiian residents.

  • 0.3% Other with 343 Other residents.

  • 5.6% Two Or More with 6,348 Two Or More residents.

  • 5.9% Hispanic with 6,805 Hispanic residents.

White
71.0% (81,155)
African American
14.6% (16,744)
American Indian
0.1% (69)
Asian
2.5% (2,908)
Hawaiian
0.0% (0)
Other
0.3% (343)
Two Or More
5.6% (6,348)
Hispanic
5.9% (6,805)

Table: St. Mary's County By Race

Race St. Mary's County MD USA
White 71.0% 47.4% 58.2%
African American 14.6% 29.2% 12.0%
American Indian 0.1% 0.1% 0.5%
Asian 2.5% 6.4% 5.7%
Hawaiian 0.0% 0.0% 0.2%
Other 0.3% 0.6% 0.5%
Two Or More 5.6% 4.2% 3.9%
Hispanic 5.9% 12.1% 19.0%

Household Income For St. Mary's County, Maryland

  • 3.6% of households in St. Mary's County earn Less than $10,000.

  • 2.3% of households in St. Mary's County earn $10,000 to $14,999.

  • 3.3% of households in St. Mary's County earn $15,000 to $24,999.

  • 4.4% of households in St. Mary's County earn $25,000 to $34,999.

  • 5.2% of households in St. Mary's County earn $35,000 to $49,999.

  • 11.6% of households in St. Mary's County earn $50,000 to $74,999.

  • 12.8% of households in St. Mary's County earn $75,000 to $99,999.

  • 20.1% of households in St. Mary's County earn $100,000 to $149,999.

  • 15.5% of households in St. Mary's County earn $150,000 to $199,999.

  • 21.2% of households in St. Mary's County earn $200,000 or more.

Less than $10,000
3.6% (4,063)
$10,000 to $14,999
2.3% (2,657)
$15,000 to $24,999
3.3% (3,748)
$25,000 to $34,999
4.4% (5,027)
$35,000 to $49,999
5.2% (5,992)
$50,000 to $74,999
11.6% (13,291)
$75,000 to $99,999
12.8% (14,606)
$100,000 to $149,999
20.1% (22,943)
$150,000 to $199,999
15.5% (17,738)
$200,000 or more
21.2% (24,302)
Income St. Mary's County MD USA
Less than $10,000 3.6% 4.3% 4.9%
$10,000 to $14,999 2.3% 2.5% 3.6%
$15,000 to $24,999 3.3% 4.5% 6.6%
$25,000 to $34,999 4.4% 4.9% 6.8%
$35,000 to $49,999 5.2% 7.9% 10.4%
$50,000 to $74,999 11.6% 13.2% 15.7%
$75,000 to $99,999 12.8% 12.0% 12.7%
$100,000 to $149,999 20.1% 19.3% 17.4%
$150,000 to $199,999 15.5% 12.4% 9.3%
$200,000 or more 21.2% 19.2% 12.6%

Highest level of educational attainment in St. Mary's County for adults over 25

  • 3.0% of adults in St. Mary's County completed < 9th grade.

  • 5.0% of adults in St. Mary's County completed 9-12th grade.

  • 29.0% of adults in St. Mary's County completed high school / ged.

  • 20.0% of adults in St. Mary's County completed some college.

  • 8.0% of adults in St. Mary's County completed associate's degree.

  • 20.0% of adults in St. Mary's County completed bachelor's degree.

  • 13.0% of adults in St. Mary's County completed master's degree.

  • 1.0% of adults in St. Mary's County completed professional degree.

  • 1.0% of adults in St. Mary's County completed doctorate degree.

< 9th Grade
3% (3,431)
9-12th Grade
5% (5,718)
High School / GED
28% (33,167)
Some College
20% (22,874)
Associate's Degree
8% (9,149)
Bachelor's Degree
20% (22,874)
Master's Degree
13% (14,868)
Professional Degree
1% (1,143)
Doctorate Degree
1% (1,143)
Education St. Mary's County MD USA
< 9th Grade 3% 3% 5%
9-12th Grade 5% 5% 6%
High School / GED 28% 24% 26%
Some College 20% 18% 19%
Associate's Degree 8% 7% 9%
Bachelor's Degree 20% 22% 21%
Master's Degree 13% 14% 10%
Professional Degree 1% 3% 2%
Doctorate Degree 1% 3% 2%

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