Charles County vs St. Mary's County
A side-by-side comparison of Charles County and St. Mary's County: population, income, housing, and more.
Charles 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.
Charles County has the higher population (168,710 vs 114,372 in St. Mary's County). Charles County has the higher median household income ($120,592 vs $114,580 in St. Mary's County). Charles County has the higher median home value ($402,300 vs $390,900 in St. Mary's County).
Population, income & housing
| Charles County | St. Mary's County | |
|---|---|---|
| Population | 168,710 | 114,372 |
| Median age | 38.8 yrs | 37.0 yrs |
| Median household income | $120,592 | $114,580 |
| Median home value | $402,300 | $390,900 |
| Median gross rent | $1,897 | $1,692 |
| Housing units | 63,053 | 46,078 |
| Homeownership rate | 81.2% | 72.6% |
| Bachelor's degree or higher | 31.6% | 35.1% |
| Unemployment rate | 5.2% | 3.8% |
Trends (ACS 5-year, 2019–2023)
| Charles County | St. Mary's County | |
|---|---|---|
| Population | 159,428 → 168,710 (+5.8%) | 112,290 → 114,372 (+1.9%) |
| Median household income | $100,003 → $120,592 (+20.6%) | $89,845 → $114,580 (+27.5%) |
| Median home value | $313,300 → $402,300 (+28.4%) | $301,300 → $390,900 (+29.7%) |
| Median gross rent | $1,682 → $1,897 (+12.8%) | $1,398 → $1,692 (+21.0%) |
Charles County
159,428168,710
$100,003$120,592
$313,300$402,300
$1,682$1,897
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)
| Charles County | St. Mary's County | |
|---|---|---|
| Under 5 | 5.8% | 6.1% |
| 5 to 17 | 18.2% | 17.9% |
| 18 to 24 | 8.3% | 8.8% |
| 25 to 34 | 12.6% | 14.0% |
| 35 to 44 | 13.6% | 13.6% |
| 45 to 54 | 14.2% | 12.3% |
| 55 to 64 | 14.2% | 13.5% |
| 65 to 74 | 8.1% | 8.4% |
| 75 and over | 5.0% | 5.3% |
Race & ethnicity (share)
| Charles County | St. Mary's County | |
|---|---|---|
| White (non-Hispanic) | 33.5% | 71.0% |
| Black or African American | 48.5% | 14.6% |
| American Indian & Alaska Native | 0.3% | 0.1% |
| Asian | 3.2% | 2.5% |
| Native Hawaiian & Pacific Islander | 0.0% | 0.0% |
| Some other race | 0.6% | 0.3% |
| Two or more races | 6.5% | 5.6% |
| Hispanic or Latino | 7.5% | 5.9% |
Educational attainment (age 25+)
Share of adults 25+
| Charles County | St. Mary's County | |
|---|---|---|
| No high school diploma | 5.7% | 7.6% |
| High school graduate | 30.1% | 28.6% |
| Some college or associate's | 32.6% | 28.6% |
| Bachelor's degree | 17.8% | 20.0% |
| Graduate or professional degree | 13.9% | 15.1% |
Commute to work
How workers get to work (share)
| Charles County | St. Mary's County | |
|---|---|---|
| Drove alone | 72.8% | 75.0% |
| Carpooled | 7.4% | 5.4% |
| Public transit | 3.9% | 1.0% |
| Walked | 0.7% | 2.4% |
| Bicycle | 0.0% | 0.1% |
| Worked from home | 14.2% | 15.3% |
| Other means | 0.9% | 0.8% |
Housing
Units in structure (share)
| Charles County | St. Mary's County | |
|---|---|---|
| 1-unit, detached | 70.6% | 73.3% |
| 1-unit, attached | 19.4% | 9.9% |
| 2 to 4 units | 1.4% | 2.0% |
| 5 to 19 units | 4.3% | 6.8% |
| 20 or more units | 3.4% | 4.7% |
| Mobile home & other | 0.9% | 3.4% |
Poverty & households
| Charles County | St. Mary's County | |
|---|---|---|
| Poverty rate | 6.6% | 7.4% |
| Average household size | 2.78 | 2.68 |
| Mean commute (minutes) | 43 | 30 |
| Median year structure built | 1990 | 1992 |
Full profiles
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