St. Mary's County, Maryland demographics
Population: 113,209
Median age: 36.7
Median household income: 102,859
Demographics, population, home values, social and economic characteristics of St. Mary's County, Maryland.
Population
| 2021 | 113,209 |
| 2020 | 113,182 |
| 2019 | 112,290 |
| 2018 | 111,531 |
| 2017 | 110,979 |
| 2016 | 110,675 |
| 2015 | 109,614 |
| 2014 | 108,472 |
| 2013 | 107,079 |
| 2012 | 105,528 |
| 2011 | 103,805 |
| 2010 | 102,086 |
| 2009 | 100,140 |
St. Mary's County, MD cities
California CDP - 14,129
Charlotte Hall CDP - 1,447
Golden Beach CDP - 3,755
Leonardtown town - 4,445
Lexington Park CDP - 12,681
Mechanicsville CDP - 1,857
Piney Point CDP - 939
St. George Island CDP - 516
Tall Timbers CDP - 559
Census data for St. Mary's County, Maryland
Demographic and housing estimates in St. Mary's County, Maryland
| Total population | 113,209 |
| Male | 56,883 |
| Female | 56,326 |
| Total population | 113,209 |
| Under 5 years | 7,049 |
| 5 to 9 years | 7,563 |
| 10 to 14 years | 8,080 |
| 15 to 19 years | 8,191 |
| 20 to 24 years | 7,086 |
| 25 to 34 years | 15,538 |
| 35 to 44 years | 14,823 |
| 45 to 54 years | 15,111 |
| 55 to 59 years | 8,325 |
| 60 to 64 years | 6,912 |
| 65 to 74 years | 8,858 |
| 75 to 84 years | 4,071 |
| 85 years and over | 1,602 |
| Median age (years) | 36.7 |
| Under 18 years | 27,480 |
| 16 years and over | 88,928 |
| 18 years and over | 85,729 |
| 21 years and over | 80,560 |
| 62 years and over | 18,451 |
| 65 years and over | 14,531 |
| Total population | 113,209 |
| One race | 105,557 |
| White | 85,113 |
| Black or African American | 15,970 |
| American Indian and Alaska Native | 53 |
| Asian | 2,825 |
| Native Hawaiian and Other Pacific Islander | 22 |
| Some other race | 1,574 |
| Two or more races | 7,652 |
| Citizen, VOTING AGE 18 and over population | 83,106 |
| Male Citizen, VOTING AGE 18 and over population | 41,431 |
| Female Citizen, VOTING AGE 18 and over population | 41,675 |
Social characteristics in St. Mary's County, Maryland
| Total households | 40,236 |
| Family households (families) | 21,711 |
| Married-couple family | 2,537 |
| Male householder, no wife present, family | 7,000 |
| Female householder, no husband present, family | 5,373 |
| Nonfamily households | 8,988 |
| Average household size | 9,837 |
| Average family size | 2.75 |
Economic characteristics in St. Mary's County, Maryland
| Total households | 40,236 |
| Less than $10,000 | 1,275 |
| $10,000 to $14,999 | 820 |
| $15,000 to $24,999 | 2,087 |
| $25,000 to $34,999 | 1,705 |
| $35,000 to $49,999 | 3,147 |
| $50,000 to $74,999 | 5,175 |
| $75,000 to $99,999 | 5,084 |
| $100,000 to $149,999 | 9,335 |
| $150,000 to $199,999 | 5,872 |
| $200,000 or more | 5,736 |
| Median household income (dollars) | 102,859 |
Housing characteristics in St. Mary's County, Maryland
| Total housing units | 45,138 |
| Occupied housing units | 40,236 |
| Vacant housing units | 4,902 |
| Total housing units | 45,138 |
| 1-unit, detached | 32,650 |
| 1-unit, attached | 4,268 |
| 2 units | 238 |
| 3 or 4 units | 576 |
| 5 to 9 units | 1,123 |
| 10 to 19 units | 2,657 |
| 20 or more units | 1,823 |
| Mobile home | 1,785 |
| Boat, RV, van, etc. | 18 |
| Total housing units | 45,138 |
| Built 2014 or later | 91 |
| Built 2010 to 2013 | 5,937 |
| Built 2000 to 2009 | 8,920 |
| Built 1990 to 1999 | 8,605 |
| Built 1980 to 1989 | 7,217 |
| Built 1970 to 1979 | 6,778 |
| Built 1960 to 1969 | 2,344 |
| Built 1950 to 1959 | 1,890 |
| Built 1940 to 1949 | 1,602 |
| Built 1939 or earlier | 1,754 |
| Total housing units | 45,138 |
| 1 room | 290 |
| 2 rooms | 680 |
| 3 rooms | 1,571 |
| 4 rooms | 3,848 |
| 5 rooms | 6,967 |
| 6 rooms | 8,444 |
| 7 rooms | 6,777 |
| 8 rooms | 6,222 |
| 9 rooms or more | 10,339 |
| Median rooms | 6.6 |
| Total housing units | 45,138 |
| No bedroom | 338 |
| 1 bedroom | 1,756 |
| 2 bedrooms | 7,435 |
| 3 bedrooms | 19,376 |
| 4 bedrooms | 12,201 |
| 5 or more bedrooms | 4,032 |
| Occupied housing units | 40,236 |
| Owner-occupied | 28,846 |
| Renter-occupied | 11,390 |
| Average household size of owner-occupied unit | 2.89 |
| Average household size of renter-occupied unit | 2.37 |
| Occupied housing units | 40,236 |
| Moved in 2017 or later | 3,973 |
| Moved in 2015 to 2016 | 11,792 |
| Moved in 2010 to 2014 | 5,947 |
| Moved in 2000 to 2009 | 9,203 |
| Moved in 1990 to 1999 | 4,783 |
| Moved in 1989 and earlier | 4,538 |
| Owner-occupied units | 28,846 |
| Less than $50,000 | 1,189 |
| $50,000 to $99,999 | 337 |
| $100,000 to $149,999 | 1,297 |
| $150,000 to $199,999 | 1,273 |
| $200,000 to $299,999 | 8,307 |
| $300,000 to $499,999 | 12,430 |
| $500,000 to $999,999 | 3,638 |
| $1,000,000 or more | 375 |
| Median (dollars) | 326,800 |
| Owner-occupied units | 28,846 |
| Housing units with a mortgage | 21,167 |
| Housing units without a mortgage | 7,679 |
| Occupied units paying rent | 11,028 |
| Less than $500 | 738 |
| $500 to $999 | 1,178 |
| $1,000 to $1,499 | 3,672 |
| $1,500 to $1,999 | 3,852 |
| $2,000 to $2,499 | 1,211 |
| $2,500 to $2,999 | 231 |
| $3,000 or more | 146 |
| Median (dollars) | 1,492 |
| No rent paid | 362 |
Demographic data for St. Mary's County, MD and each city in the county. Lists of cities by population, wealth and poverty in St. Mary's County, MD.
Links