Population by Age in St. Mary's County
*Base on 2010 Data
| Total population | 105,151 | 100.00% |
| Under 5 years | 7,580 | 7.21% |
| 5 to 9 years | 7,628 | 7.25% |
| 10 to 14 years | 7,655 | 7.28% |
| 15 to 19 years | 7,932 | 7.54% |
| 20 to 24 years | 7,228 | 6.87% |
| 25 to 29 years | 6,973 | 6.63% |
| 30 to 34 years | 6,383 | 6.07% |
| 35 to 39 years | 6,697 | 6.37% |
| 40 to 44 years | 8,056 | 7.66% |
| 45 to 49 years | 9,039 | 8.60% |
| 50 to 54 years | 7,941 | 7.55% |
| 55 to 59 years | 6,191 | 5.89% |
| 60 to 64 years | 5,067 | 4.82% |
| 65 to 69 years | 3,663 | 3.48% |
| 70 to 74 years | 2,639 | 2.51% |
| 75 to 79 years | 1,835 | 1.75% |
| 80 to 84 years | 1,359 | 1.29% |
| 85 years and over | 1,285 | 1.22% |
Male Population in St. Mary's County
*Base on 2010 Data
| Male population | 52,321 | 49.76% |
| Under 5 years | 3,846 | 3.66% |
| 5 to 9 years | 3,790 | 3.60% |
| 10 to 14 years | 3,905 | 3.71% |
| 15 to 19 years | 4,000 | 3.80% |
| 20 to 24 years | 3,594 | 3.42% |
| 25 to 29 years | 3,575 | 3.40% |
| 30 to 34 years | 3,143 | 2.99% |
| 35 to 39 years | 3,223 | 3.07% |
| 40 to 44 years | 3,937 | 3.74% |
| 45 to 49 years | 4,622 | 4.40% |
| 50 to 54 years | 4,033 | 3.84% |
| 55 to 59 years | 3,076 | 2.93% |
| 60 to 64 years | 2,490 | 2.37% |
| 65 to 69 years | 1,839 | 1.75% |
| 70 to 74 years | 1,302 | 1.24% |
| 75 to 79 years | 830 | 0.79% |
| 80 to 84 years | 608 | 0.58% |
| 85 years and over | 508 | 0.48% |
Female Population in St. Mary's County
*Base on 2010 Data
| Female population | 52,830 | 50.24% |
| Under 5 years | 3,734 | 3.55% |
| 5 to 9 years | 3,838 | 3.65% |
| 10 to 14 years | 3,750 | 3.57% |
| 15 to 19 years | 3,932 | 3.74% |
| 20 to 24 years | 3,634 | 3.46% |
| 25 to 29 years | 3,398 | 3.23% |
| 30 to 34 years | 3,240 | 3.08% |
| 35 to 39 years | 3,474 | 3.30% |
| 40 to 44 years | 4,119 | 3.92% |
| 45 to 49 years | 4,417 | 4.20% |
| 50 to 54 years | 3,908 | 3.72% |
| 55 to 59 years | 3,115 | 2.96% |
| 60 to 64 years | 2,577 | 2.45% |
| 65 to 69 years | 1,824 | 1.73% |
| 70 to 74 years | 1,337 | 1.27% |
| 75 to 79 years | 1,005 | 0.96% |
| 80 to 84 years | 751 | 0.71% |
| 85 years and over | 777 | 0.74% |
Median Age in St. Mary's County
*Base on 2010 Data
| Both | 36.00% | |
| Male | 35.50% | |
| Female | 36.40% |
Race in St. Mary's County
*Base on 2010 Data
| Total | 105,151 | 100.00% |
| Population of one race | 101,813 | 96.83% |
| White | 82,636 | 78.59% |
| Black or African American | 15,030 | 14.29% |
| American Indian and Alaska Native | 424 | 0.40% |
| Asian | 2,596 | 2.47% |
| Asian Indian | 420 | 0.40% |
| Chinese | 328 | 0.31% |
| Filipino | 992 | 0.94% |
| Japanese | 143 | 0.14% |
| Korean | 266 | 0.25% |
| Vietnamese | 232 | 0.22% |
| Other Asian | 215 | 0.20% |
| Native Hawaiian and Other Pacific Islander | 73 | 0.07% |
| Native Hawaiian | 17 | 0.02% |
| Guamanian or Chamorro | 30 | 0.03% |
| Samoan | 13 | 0.01% |
| Other Pacific Islander | 13 | 0.01% |
| Some Other Race | 1,054 | 1.00% |
| Population of Two or More Races | 3,338 | 3.17% |
| White; American Indian and Alaska Native | 488 | 0.46% |
| White; Asian | 729 | 0.69% |
| White; Black or African American | 1,220 | 1.16% |
| White; Some Other Race | 206 | 0.20% |
The Population 16 Years in St. Mary's County
*Base on 2010 Data
| Total | 80,679 | 100.00% |
| Male | 39,956 | 49.52% |
| Female | 40,723 | 50.48% |
The Population 18 Years in St. Mary's County
*Base on 2010 Data
| Total | 77,565 | 100.00% |
| Male | 38,364 | 49.46% |
| Female | 39,201 | 50.54% |
The Population 21 Years in St. Mary's County
*Base on 2010 Data
| Total | 72,723 | 100.00% |
| Male | 35,987 | 49.49% |
| Female | 36,736 | 50.51% |
The Population 62 Years in St. Mary's County
*Base on 2010 Data
| Total | 13,710 | 100.00% |
| Male | 6,556 | 47.82% |
| Female | 7,154 | 52.18% |
The Population 65 Years in St. Mary's County
*Base on 2010 Data
| Total | 10,781 | 100.00% |
| Male | 5,087 | 47.18% |
| Female | 5,694 | 52.82% |
Race (total races tallied) in St. Mary's County
*Base on 2010 Data
| White alone or in combination with one or more other races | 85,607 | 78.69% |
| Black or African American alone or in combination with one or more other races | 16,720 | 15.37% |
| American Indian and Alaska Native alone or in combination with one or more other races | 1,231 | 1.13% |
| Asian alone or in combination with one or more other races | 3,633 | 3.34% |
| Native Hawaiian and Other Pacific Islander alone or in combination with one or more other races | 202 | 0.19% |
| Some Other Race alone or in combination with one or more other races | 1,398 | 1.29% |
Hispanic or Latino by Specific Origin in St. Mary's County
*Base on 2010 Data
| Total | 105,151 | 100.00% |
| Hispanic or Latino (of any race) | 3,972 | 3.78% |
| Mexican | 1,375 | 1.31% |
| Puerto Rican | 1,057 | 1.01% |
| Cuban | 134 | 0.13% |
| Other Hispanic or Latino | 1,406 | 1.34% |
| Not Hispanic or Latino | 101,179 | 96.22% |
Hispanic or Latino and Race in St. Mary's County
*Base on 2010 Data
| Total | 105,151 | 100.00% |
| Hispanic or Latino | 3,972 | 3.78% |
| White alone | 2,234 | 2.12% |
| Black or African American alone | 199 | 0.19% |
| American Indian and Alaska Native alone | 85 | 0.08% |
| Asian alone | 44 | 0.04% |
| Native Hawaiian and Other Pacific Islander alone | 9 | 0.01% |
| Some Other Race alone | 935 | 0.89% |
| Two or More Races | 466 | 0.44% |
| Not Hispanic or Latino | 101,179 | 96.22% |
| White alone | 80,402 | 76.46% |
| Black or African American alone | 14,831 | 14.10% |
| American Indian and Alaska Native alone | 339 | 0.32% |
| Asian alone | 2,552 | 2.43% |
| Native Hawaiian and Other Pacific Islander alone | 64 | 0.06% |
| Some Other Race alone | 119 | 0.11% |
| Two or More Races | 2,872 | 2.73% |
Relationship in St. Mary's County
*Base on 2010 Data
| Total | 105,151 | 100.00% |
| In households | 102,225 | 97.22% |
| Householder | 37,604 | 35.76% |
| Spouse | 20,870 | 19.85% |
| Child | 32,691 | 31.09% |
| Own child under 18 years | 24,881 | 23.66% |
| Other relatives | 5,490 | 5.22% |
| Under 18 years | 2,211 | 2.10% |
| 65 years and over | 971 | 0.92% |
| Nonrelatives | 5,570 | 5.30% |
| Under 18 years | 460 | 0.44% |
| 65 years and over | 197 | 0.19% |
| Unmarried partner | 2,756 | 2.62% |
| In group quarters | 2,926 | 2.78% |
| Institutionalized population | 923 | 0.88% |
| Male | 685 | 0.65% |
| Female | 238 | 0.23% |
| Noninstitutionalized population | 2,003 | 1.90% |
| Male | 954 | 0.91% |
| Female | 1,049 | 1.00% |
Households by Type in St. Mary's County
*Base on 2010 Data
| Subject | Number | Percent |
|---|---|---|
| Total | 37,604 | 100.00% |
| Family households (families) | 27,084 | 72.02% |
| With own children under 18 years | 13,136 | 34.93% |
| Husband-wife family | 20,870 | 55.50% |
| With own children under 18 years | 9,501 | 25.27% |
| Male householder, no wife present | 1,824 | 4.85% |
| With own children under 18 years | 1,011 | 2.69% |
| Female householder, no husband present | 4,390 | 11.67% |
| With own children under 18 years | 2,624 | 6.98% |
| Nonfamily households | 10,520 | 27.98% |
| Householder living alone | 8,183 | 21.76% |
| Male | 4,251 | 11.30% |
| 65 years and over | 823 | 2.19% |
| Female | 3,932 | 10.46% |
| 65 years and over | 1,647 | 4.38% |
Households with individuals under 18 years in St. Mary's County
*Base on 2010 Data
| Total | 14,464 | 38.46% |
Households with individuals under 65 years in St. Mary's County
*Base on 2010 Data
| Total | 7,571 | 20.13% |
Average Household Size in St. Mary's County
*Base on 2010 Data
| Average household size | 3 | % |
Average Family Size in St. Mary's County
*Base on 2010 Data
| Average family size | 3 | % |
Housing Occupancy(Total housing units) in St. Mary's County
*Base on 2010 Data
| Total | 41,282 | 100.00% |
| Occupied housing units | 37,604 | 91.09% |
| Vacant housing units | 3,678 | 8.91% |
| For rent | 960 | 2.33% |
| Rented, not occupied | 54 | 0.13% |
| For sale only | 514 | 1.25% |
| Sold, not occupied | 127 | 0.31% |
| For seasonal, recreational, or occasional use | 1,231 | 2.98% |
| All other vacants | 792 | 1.92% |
Homeowner Vacancy Rate in St. Mary's County
*Base on 2010 Data
| Homeowner vacancy rate (percent) | 1.90% |
Rental Vacancy Rate in St. Mary's County
*Base on 2010 Data
| Rental vacancy rate (percent) | 8.20% |
Housing Tenure(Occupied housing units) in St. Mary's County
*Base on 2010 Data
| Total | 37,604 | 100.00% |
| Owner-occupied housing units | 26,966 | 71.71% |
| Renter-occupied housing units | 10,638 | 28.29% |
Population in Occupied Housing Units by Tenure(Population in occupied housing units) in St. Mary's County
*Base on 2010 Data
| Owner-occupied housing units | 75,310 | 73.67% |
| Renter-occupied housing units | 26,915 | 26.33% |
Average Household Size of Occupied Housing Units by Tenure in St. Mary's County
*Base on 2010 Data
| Owner occupied | 3 | % |
| Renter occupied | 3 | % |