St. Mary's
Maryland
114K
Population
$114K
Median Income
$432K
Median Home
R+33
Politics
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What stands out
What stands out about St. Mary's County: the median household income is in the top 2% of American counties ($113,668), the typical two-bedroom rent is in the top 4% of American counties ($1,522 a month), and the uninsured rate is in the bottom 4% of American counties (5.1%). Within Maryland it ranks 7th of 24 counties for the median household income.
Where you are
You live in St. Mary's County, Maryland. 113,814 people live here with you. The population grew 0.4% last year, and more Americans moved out than in (net -96).
Maryland is the only state that levies both an estate tax and an inheritance tax, and its counties add their own income taxes of up to 3.2% on top of the state rate. Household income is the highest in the country, concentrated in the Washington suburbs of Montgomery and Howard counties. Social Security is not taxed and there is a pension exclusion for residents 65 and over.
Money
The typical household here brings in $113,668 a year, higher than 98% of American counties. Employers pay an average wage of $85,381. Unemployment runs 3.1%, lower than 63% of American counties. 14% of workers work from home.
Maryland takes 4.7% of that median income in state income tax, about $5,381 a year.
Home
The median home costs $437K, pricier than 89% of American counties, about 2.8 years of the median household's income. A two-bedroom rents for around $1,522 a month. Property tax is 0.89% of home value, roughly $3,355 a year on that median home, higher than 52% of American counties. 72% of households own rather than rent.
Safety and health
Violent crime here is 3.1 per 1,000 residents, lower than 86% of American counties. Drug overdoses killed 22 people per 100,000 in 2024.
A child born here can expect to live 77.5 years, longer than 69% of American counties. There are 127 active physicians in the county, about 11.2 per 10,000 people. 5.1% of people under 65 have no health insurance.
School
92% of adults finished high school.
Neighbors and politics
In 2024 your neighbors voted Republican by 33 points. 67% of eligible voters turned out. Under Maryland law you need local approval to carry a concealed handgun, abortion is protected by state law, and marijuana is legal for adults.
Weather and risk
The year averages 58°F, highs near 67 and lows near 48, warmer than 58% of American counties. About 41 inches of rain and snow fall a year. FEMA puts natural-hazard risk at 82 out of 100, riskier than 82% of American counties; the county has had 18 federal disaster declarations since 1953.
Getting around, going out
Home internet averages 223 Mbps down, faster than 60% of American counties. There are 14 airports in the county, counting general aviation. For a night or a weekend out: 0.5 full-service restaurants per 1,000 people.
Written from the figures below. Percentiles compare this county with every other county that reports the same figure; missing figures are left out rather than guessed.
Economy
Housing
Sources: Zillow ZHVI · Census ACS 2022 · Tax Foundation 2023 (effective rates)
Annual tax on median home: $3,355
Affordability & Supply
Market Activity
Sources: Zillow Research monthly · Redfin
Source: Zillow Research · Updated monthly
Sale-to-List Cross-Reference
Zillow 99.4% · Redfin 100.5%
Source: Redfin · Updated monthly
Health
Education
Safety
Climate & Air Quality
Outdoor & Recreation
Internet & Remote Work
Commute & Transit
Families & Childcare
Civic & Community
Lifestyle & Services
Debt Burden
Innovation
Politics
R+33
2024 Presidential · Maryland was D+24 statewide
vs Maryland State
Population & Migration
Net Domestic Migration 2023
↓ -96
More people leaving than arriving
IRS Wealth Migration
Lower-income migration pattern (IRS: 0.77x avg income)
Economic Mobility
42%
chance a low-income child reaches the middle class
Source: Opportunity Insights
Real Estate
Find Homes in St. Mary's County
Median home value: $437K
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Full Maryland profile
Taxes, cost of living, crime, schools, gun laws and more.
Data: Census ACS, BLS, Zillow, USDA Natural Amenities, OpenElections 2024, CMS, NCES. Vintage 2022–2025. News via Google News.