Calvert County vs St. Mary's County
A side-by-side comparison of Calvert County and St. Mary's County: population, income, housing, and more.
Calvert County and St. Mary's County are counties in Maryland. This page compares them across population, income, housing, education, commuting, and how each has changed since 2019.
St. Mary's County has the higher population (114,372 vs 93,791 in Calvert County). Calvert County has the higher median household income ($132,059 vs $114,580 in St. Mary's County). Calvert County has the higher median home value ($440,200 vs $390,900 in St. Mary's County).
Population, income & housing
| Calvert County | St. Mary's County | |
|---|---|---|
| Population | 93,791 | 114,372 |
| Median age | 40.5 yrs | 37.0 yrs |
| Median household income | $132,059 | $114,580 |
| Median home value | $440,200 | $390,900 |
| Median gross rent | $1,701 | $1,692 |
| Housing units | 35,960 | 46,078 |
| Homeownership rate | 87.2% | 72.6% |
| Bachelor's degree or higher | 35.3% | 35.1% |
| Unemployment rate | 2.9% | 3.8% |
Trends (ACS 5-year, 2019–2023)
| Calvert County | St. Mary's County | |
|---|---|---|
| Population | 91,511 → 93,791 (+2.5%) | 112,290 → 114,372 (+1.9%) |
| Median household income | $109,313 → $132,059 (+20.8%) | $89,845 → $114,580 (+27.5%) |
| Median home value | $358,800 → $440,200 (+22.7%) | $301,300 → $390,900 (+29.7%) |
| Median gross rent | $1,520 → $1,701 (+11.9%) | $1,398 → $1,692 (+21.0%) |
Calvert County
91,51193,791
$109,313$132,059
$358,800$440,200
$1,520$1,701
St. Mary's County
112,290114,372
$89,845$114,580
$301,300$390,900
$1,398$1,692
Age & race/ethnicity
Age distribution (share)
| Calvert County | St. Mary's County | |
|---|---|---|
| Under 5 | 5.3% | 6.1% |
| 5 to 17 | 18.0% | 17.9% |
| 18 to 24 | 7.7% | 8.8% |
| 25 to 34 | 11.4% | 14.0% |
| 35 to 44 | 13.3% | 13.6% |
| 45 to 54 | 13.2% | 12.3% |
| 55 to 64 | 15.3% | 13.5% |
| 65 to 74 | 9.5% | 8.4% |
| 75 and over | 6.4% | 5.3% |
Race & ethnicity (share)
| Calvert County | St. Mary's County | |
|---|---|---|
| White (non-Hispanic) | 74.3% | 71.0% |
| Black or African American | 12.2% | 14.6% |
| American Indian & Alaska Native | 0.1% | 0.1% |
| Asian | 1.8% | 2.5% |
| Native Hawaiian & Pacific Islander | 0.1% | 0.0% |
| Some other race | 0.6% | 0.3% |
| Two or more races | 6.0% | 5.6% |
| Hispanic or Latino | 4.9% | 5.9% |
Educational attainment (age 25+)
Share of adults 25+
| Calvert County | St. Mary's County | |
|---|---|---|
| No high school diploma | 5.1% | 7.6% |
| High school graduate | 28.6% | 28.6% |
| Some college or associate's | 31.0% | 28.6% |
| Bachelor's degree | 19.5% | 20.0% |
| Graduate or professional degree | 15.8% | 15.1% |
Commute to work
How workers get to work (share)
| Calvert County | St. Mary's County | |
|---|---|---|
| Drove alone | 74.3% | 75.0% |
| Carpooled | 5.7% | 5.4% |
| Public transit | 1.7% | 1.0% |
| Walked | 0.8% | 2.4% |
| Bicycle | 0.1% | 0.1% |
| Worked from home | 16.4% | 15.3% |
| Other means | 0.9% | 0.8% |
Housing
Units in structure (share)
| Calvert County | St. Mary's County | |
|---|---|---|
| 1-unit, detached | 86.7% | 73.3% |
| 1-unit, attached | 6.9% | 9.9% |
| 2 to 4 units | 0.5% | 2.0% |
| 5 to 19 units | 2.0% | 6.8% |
| 20 or more units | 3.1% | 4.7% |
| Mobile home & other | 0.9% | 3.4% |
Poverty & households
| Calvert County | St. Mary's County | |
|---|---|---|
| Poverty rate | 4.0% | 7.4% |
| Average household size | 2.78 | 2.68 |
| Mean commute (minutes) | 41 | 30 |
| Median year structure built | 1990 | 1992 |
Full profiles
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