Carroll County vs St. Mary's County
A side-by-side comparison of Carroll County and St. Mary's County: population, income, housing, and more.
Carroll 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.
Carroll County has the higher population (174,318 vs 114,372 in St. Mary's County). Carroll County has the higher median household income ($115,876 vs $114,580 in St. Mary's County). Carroll County has the higher median home value ($406,400 vs $390,900 in St. Mary's County).
Population, income & housing
| Carroll County | St. Mary's County | |
|---|---|---|
| Population | 174,318 | 114,372 |
| Median age | 41.3 yrs | 37.0 yrs |
| Median household income | $115,876 | $114,580 |
| Median home value | $406,400 | $390,900 |
| Median gross rent | $1,370 | $1,692 |
| Housing units | 66,167 | 46,078 |
| Homeownership rate | 83.9% | 72.6% |
| Bachelor's degree or higher | 39.7% | 35.1% |
| Unemployment rate | 3.2% | 3.8% |
Trends (ACS 5-year, 2019–2023)
| Carroll County | St. Mary's County | |
|---|---|---|
| Population | 167,699 → 174,318 (+3.9%) | 112,290 → 114,372 (+1.9%) |
| Median household income | $96,769 → $115,876 (+19.7%) | $89,845 → $114,580 (+27.5%) |
| Median home value | $339,600 → $406,400 (+19.7%) | $301,300 → $390,900 (+29.7%) |
| Median gross rent | $1,132 → $1,370 (+21.0%) | $1,398 → $1,692 (+21.0%) |
Carroll County
167,699174,318
$96,769$115,876
$339,600$406,400
$1,132$1,370
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)
| Carroll County | St. Mary's County | |
|---|---|---|
| Under 5 | 5.5% | 6.1% |
| 5 to 17 | 16.5% | 17.9% |
| 18 to 24 | 8.3% | 8.8% |
| 25 to 34 | 11.1% | 14.0% |
| 35 to 44 | 12.7% | 13.6% |
| 45 to 54 | 13.2% | 12.3% |
| 55 to 64 | 15.1% | 13.5% |
| 65 to 74 | 10.2% | 8.4% |
| 75 and over | 7.4% | 5.3% |
Race & ethnicity (share)
| Carroll County | St. Mary's County | |
|---|---|---|
| White (non-Hispanic) | 85.6% | 71.0% |
| Black or African American | 3.9% | 14.6% |
| American Indian & Alaska Native | 0.1% | 0.1% |
| Asian | 2.3% | 2.5% |
| Native Hawaiian & Pacific Islander | 0.0% | 0.0% |
| Some other race | 0.6% | 0.3% |
| Two or more races | 2.8% | 5.6% |
| Hispanic or Latino | 4.8% | 5.9% |
Educational attainment (age 25+)
Share of adults 25+
| Carroll County | St. Mary's County | |
|---|---|---|
| No high school diploma | 5.1% | 7.6% |
| High school graduate | 27.6% | 28.6% |
| Some college or associate's | 27.5% | 28.6% |
| Bachelor's degree | 24.0% | 20.0% |
| Graduate or professional degree | 15.7% | 15.1% |
Commute to work
How workers get to work (share)
| Carroll County | St. Mary's County | |
|---|---|---|
| Drove alone | 76.1% | 75.0% |
| Carpooled | 6.4% | 5.4% |
| Public transit | 0.4% | 1.0% |
| Walked | 0.9% | 2.4% |
| Bicycle | 0.1% | 0.1% |
| Worked from home | 15.6% | 15.3% |
| Other means | 0.6% | 0.8% |
Housing
Units in structure (share)
| Carroll County | St. Mary's County | |
|---|---|---|
| 1-unit, detached | 77.3% | 73.3% |
| 1-unit, attached | 11.2% | 9.9% |
| 2 to 4 units | 3.6% | 2.0% |
| 5 to 19 units | 4.6% | 6.8% |
| 20 or more units | 2.6% | 4.7% |
| Mobile home & other | 0.8% | 3.4% |
Poverty & households
| Carroll County | St. Mary's County | |
|---|---|---|
| Poverty rate | 5.3% | 7.4% |
| Average household size | 2.68 | 2.68 |
| Mean commute (minutes) | 35 | 30 |
| Median year structure built | 1983 | 1992 |
Full profiles
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