St. Mary's County, Maryland Income Statistics
St. Mary's County Wealth Score
The wealth index reflects the overall economic prosperity and financial well-being of a county's residents based on income levels, employment rates, and income inequality metrics.
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B
St. Mary's County Around average
Source: Map AI Methodology
Income Statistics Overview
| Metric | St. Mary's County | Maryland Avg | US Average |
|---|---|---|---|
| Median Household Income | $119,889 | $103,916 | $80,455 |
| Median Personal Income | $82,800 | $75,715 | $60,758 |
| Average Yearly Income Growth | 4.2% | 4.0% | 4.8% |
| Six-Figure Earners | 24.0% | 20.7% | 13.9% |
| $200k+ Households | 23.5% | 20.3% | 13.2% |
The median household income in St. Mary's County is about 15% higher than in Maryland. Income has been growing faster in St. Mary's County (4.2%/yr) than in Maryland (4.0%/yr).
About 24% of adults in St. Mary's County earn six figures ($100,000 or more) a year, higher than the Maryland average of 21%.
Median Household Income 2009–2024 Trend
Median Household Income Over Time
Median household income in St. Mary's County, Maryland grew by 58.7% from 2009 to 2024, reaching $119,889 in 2024. That's an average of about 4.2% per year.
Income Inequality and the Gender Pay Gap in St. Mary's County
| Metric | St. Mary's County | Maryland Avg | US Average |
|---|---|---|---|
| Gini Coefficient | 0.525 | 0.534 | 0.552 |
| Male Median Income | $98,221 | $84,327 | $69,667 |
| Female Median Income | $71,551 | $72,201 | $56,850 |
| Gender Pay Gap | 27.2% | 14.4% | 18.4% |
The Gini coefficient measures how evenly income is shared between richer and poorer households, from 0 (everyone earns the same) to 1 (one household earns nearly everything). The lower the number, the more equally income is distributed. In St. Mary's County, it is 0.525, lower than Maryland's 0.534, so income is more evenly distributed here than there, and lower than the US's 0.552, so income is more evenly distributed here than there.
Men's income is about 37% more than women's income in St. Mary's County, Maryland. Over a 35-year career, a 37% wage gap accumulates to roughly $933,450 in unearned income for female workers in the area.
Income by Sex Over Time
Since 2009, the income gap between men and women in St. Mary's County, Maryland has widened from about 25% to 27% in 2024. Over that period the gap was widest at 35% in 2019. In dollar terms, the gap has widened by $11,022 since 2009.
Sharply against the trend: the pay gap in St. Mary's County widened by 1.9 points while Maryland's narrowed by 5.1 points.
Employment
| Metric | St. Mary's County | Maryland Avg | US Average |
|---|---|---|---|
| Unemployment Rate | 3.4% | 4.8% | 5.2% |
| Working from Home | 17.5% | 19.3% | 15.0% |
| Commute time (minutes) | 22 | 28 | 22 |
Approximately 2,113 people are unemployed in St. Mary's County, Maryland.
The average commute time in St. Mary's County is 22 minutes, shorter than the 28 minutes in Maryland.
Unemployment Rate Over Time
Since 2011, the unemployment rate in St. Mary's County, Maryland has fallen from 4.5% to 3.4% in 2024. Over that period the rate peaked at 5.3% in 2013 and fell as low as 3.2% in 2019.
St. Mary's County, MD Wealth Compared With Nearby Counties
St. Mary's County, MD is the largest of the 6 counties compared here, 115,126 residents against a local median of 18,825. St. Mary's County, MD's median household income, at $119,889, runs 79% above the $66,900 typical of the counties around it. That is the better end of the local range on this measure.
Income growth tells the same story from another angle: 4.2%/yr against a local median of 3.3%/yr, 28% above it. Every measure here with a clear better direction points the same way, so St. Mary's County, MD is not trading one advantage for another, it reads stronger than its neighbours across the board. The counties themselves spread $72,068 on median household income, so St. Mary's County, MD sits at one end of an already wide local range rather than apart from it. St. Mary's County, MD has the 2nd highest median household income of the 6 areas compared here.
| Area | Population | Median household income | Income growthAverage yearly change in median household income since 2016. Each year is measured in its own dollars, so this is growth before inflation. | Unemployment | Income inequalityGini coefficient: 0 would mean every household earns the same, 1 that a single household earns everything. The lower the number, the more equally income is shared here. |
|---|---|---|---|---|---|
| St. Mary's County, MD | 115,126 | $119,889 #2/6 | 4.2%/yr #2/6 | 3.4% #3/6 | 0.525 #2/6 |
| Westmoreland County, VA | 18,825 | $64,504 | 2.5%/yr | 7.2% | 0.538 |
| Calvert County, MD | 94,313 | $134,676 | 4.2%/yr | 2.6% | 0.513 |
| Richmond County, VA | 9,095 | $69,824 | 5.8%/yr | 2.5% | 0.537 |
| Northumberland County, VA | 12,188 | $66,900 | 2.7%/yr | 3.7% | 0.529 |
| Dorchester County, MD | 32,754 | $62,608 | 3.3%/yr | 5.7% | 0.533 |
Conclusion
Considering all these factors, St. Mary's County, Maryland has an overall wealth index grade of B, making it somewhat better than Maryland, and somewhat better than the country as a whole.
Frequently Asked Questions
Common questions about income and wealth in St. Mary's County, Maryland.
How Rich Is St. Mary's County, Maryland?
St. Mary's County has a wealth index grade of B. The wealth index grades areas from A+ (best) to F- by combining income levels, employment rates, and income inequality; a B grade means residents are quite well off compared to the U.S. average. The median household income is $119,889, about 15% higher than the Maryland average of $103,916.
How has median household income changed in St. Mary's County, Maryland?
Between 2009 and 2024, the median household income in St. Mary's County, Maryland rose 59%, from $75,567 to $119,889. Over the same years, income here outpaced Maryland as a whole: +59% against +49%.
What was the median household income in St. Mary's County in 2023?
In 2023, the median household income in St. Mary's County, Maryland was $115,463, up 1% from $114,343 in 2022. The Maryland median that year was $101,974.
What was the median household income in St. Mary's County in 2020?
In 2020, the median household income in St. Mary's County, Maryland was $96,241. By 2024 it had risen 25% to $119,889.
Is unemployment high in St. Mary's County, Maryland?
Unemployment in St. Mary's County, Maryland is only 3.4%, well below the Maryland rate of 4.8%, a sign of a tight labor market where employers compete for workers.
What is the Gini coefficient in St. Mary's County, Maryland?
The Gini coefficient in St. Mary's County is 0.525. It measures income inequality on a scale from 0 (everyone earns the same) to 1 (one household earns everything). That is lower than the US average of 0.552, so income is distributed more equally than in the country overall.
How has the income gap between men and women changed in St. Mary's County, Maryland?
Since 2009, the income gap between men and women in St. Mary's County, Maryland has widened from about 25% to 27% in 2024. Over that period the gap was widest at 35% in 2019. In dollar terms, the gap has widened by $11,022 since 2009.
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