St. Mary's County, MD

County in Maryland, South · ranked on 47 metrics

Rank among US counties

St. Mary's County, MD is a county in Maryland with a population of 117,168 (555th of 3,094). It ranks best for Median Household Income (56th of 3,093), Median Income (56th of 2,000), Homes with Broadband Internet (%) (263rd of 3,094). It ranks lowest for Median Home Value ($2,000,001 Means $2M or More) (2,818th of 3,092), Average Commute (Minutes) (2,599th of 3,094).

Population
117.2K
555th highest of 3,094
Density
326.4
412th highest of 3,094
Growth since 2020
2.79%
1,129th highest of 3,094
Area
359
2,618th highest of 3,094
Region
South
Maryland

Strengths and weak spotsPercentileWhere a place sits among all places, from 0 to 100. 100 is the best, 50 is the middle, 0 is the worst.More in the glossary →

Percentile on 21 metrics that rank at least half of all US counties, given whether higher or lower is better.

Totals that track populationCounts like “number of burglaries” that mostly reflect how many people live somewhere, so big places rank high or low regardless.More in the glossary →

Best at

Highest percentiles, given whether higher or lower is better

  1. Median Household Income$119,446
    Housing, Income and Commutes by County (Census) · 2024
    56th of 3,093
  2. Median Income$119,446
    Poorest Counties
    56th of 2,000
  3. Homes with Broadband Internet (%)93.1%
    Housing, Income and Commutes by County (Census) · 2024
    263rd of 3,094
  4. Poverty Rate (%)7.98%
    Housing, Income and Commutes by County (Census) · 2024
    354th of 3,094
  5. Bachelor’s Degree or Higher (% of Adults 25+)36.5%
    Housing, Income and Commutes by County (Census) · 2024
    397th of 3,094
  6. Adults Who Smoke (%)12.7%
    Health of Adults by County (CDC PLACES) · 2023
    tied 391st of 2,916
  7. Adults 18–64 Without Health Insurance (%)7.9%
    Health of Adults by County (CDC PLACES) · 2023
    tied 434th of 2,916
  8. Adults with No Leisure-Time Exercise (%)22.3%
    Health of Adults by County (CDC PLACES) · 2023
    tied 516th of 2,916
  9. Adults with Frequent Mental Distress (%)16.9%
    Health of Adults by County (CDC PLACES) · 2023
    tied 537th of 2,916
  10. Adults in Fair or Poor Health (%)16.6%
    Health of Adults by County (CDC PLACES) · 2023
    tied 554th of 2,916

Worst at

Lowest percentiles, given whether higher or lower is better

  1. Median Rent (Monthly; $3,501 Means $3,500 or More)$1,747
    Housing, Income and Commutes by County (Census) · 2024
    tied 2,973rd of 3,090
  2. Median Home Value ($2,000,001 Means $2M or More)$407,600
    Housing, Income and Commutes by County (Census) · 2024
    2,818th of 3,092
  3. Average Commute (Minutes)29.9
    Housing, Income and Commutes by County (Census) · 2024
    2,599th of 3,094
  4. Cooling Degree Days per Year1,328
    Climate by County (1991–2020 Averages)
    1,802nd of 3,050
  5. Adults Who Binge Drink (%)17.7%
    Health of Adults by County (CDC PLACES) · 2023
    tied 1,486th of 2,916
  6. Adults Sleeping Under 7 Hours (%)37.7%
    Health of Adults by County (CDC PLACES) · 2022
    tied 1,554th of 3,094
  7. Adults with Diabetes (%)10.3%
    Health of Adults by County (CDC PLACES) · 2023
    tied 1,202nd of 2,916
  8. Adults with Obesity (%)37.2%
    Health of Adults by County (CDC PLACES) · 2023
    tied 1,183rd of 2,916
  9. Heating Degree Days per Year4,053
    Climate by County (1991–2020 Averages)
    1,155th of 3,050
  10. Adults with a Yearly Checkup (%)76.5%
    Health of Adults by County (CDC PLACES) · 2023
    tied 1,057th of 2,916

Profile by category

Average percentile per category, from the median line. Select a category to list its metrics.

Strongest category Health (70), weakest Economics (61). Select a category to list its metrics.

Notable facts

Where it ranks first or last among US counties

Never first or last on a widely ranked metric.

Where it is

Shaded by population; select a place to open it

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Similar places

Closest percentiles on 18 widely reported measures from 7 categories, leaving out size and totals

  1. Harford County, MD90% similar
    Compared on 13 of 18
  2. Gloucester County, NJ88% similar
    Compared on 14 of 18
  3. Carroll County, MD86% similar
    Compared on 13 of 18
  4. Cabarrus County, NC86% similar
    Compared on 14 of 18
  5. Warrick County, IN85% similar
    Compared on 13 of 18

Quick answers

What is the population of St. Mary's County, MD?
St. Mary's County, MD has a population of 117,168, 555th among 3,094 US counties.
What does St. Mary's County, MD rank best at?
Among US counties, St. Mary's County, MD ranks best for Median Household Income (56th of 3,093); Median Income (56th of 2,000); Homes with Broadband Internet (%) (263rd of 3,094).
Where does St. Mary's County, MD rank worst?
St. Mary's County, MD ranks lowest for Median Home Value ($2,000,001 Means $2M or More) (2,818th of 3,092); Average Commute (Minutes) (2,599th of 3,094).
How many statistics does Rankodex have for St. Mary's County, MD?
Rankodex ranks St. Mary's County, MD on 47 statistics compared with other US counties, compiled from World Population Review and the sources it cites.

Every metric

47 metrics with a value for this place, in 13 topics