Health Profile of St. Mary's County, Maryland
St. Mary's County Health Score
The Map AI Health Index is a score that reflects local life expectancy, disease rates, healthcare access, and physical environment to help you quickly compare the overall health and well-being of different areas.
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B
St. Mary's County Around average
Source: Map AI Methodology
General Health Overview
| Metric | St. Mary's County | Maryland Avg | US Average |
|---|---|---|---|
| Life Expectancy (years) | 80.8 | 78.4 | 78.3 |
| Uninsured Population (%) | 3.9% | 6.3% | 8.4% |
| Self-Rated Poor Health | 11.5% | 13.2% | 16.3% |
Life expectancy in St. Mary's County is 80.8 years, about 2.3 years longer than the Maryland average of 78.4 years. The uninsured rate is 3.9%, lower than the Maryland average of 6.3%. Self-rated poor health is reported by 11.5% of residents, lower than the Maryland average of 13.2%.
Population by Age
Older residents
37,073 residents in St. Mary's County are age 50 or older.
- 85+ 1,620 576 men · 1,044 women
- 75–84 4,301 2,047 men · 2,255 women
- 65–74 8,545 4,152 men · 4,393 women
- 50–64 22,607 11,383 men · 11,224 women
Younger residents
26,260 residents in St. Mary's County are age 17 or younger.
- 12–17 8,066 3,994 boys · 4,072 girls
- 7–12 7,928 4,139 boys · 3,788 girls
- 3–7 6,021 3,238 boys · 2,783 girls
- 0–3 4,245 2,162 boys · 2,083 girls
About 3,042 residents in St. Mary's County (2.6% of the population) are older than the area's life expectancy of 80.8 years.
The highlighted slice of the age axis is the share of residents older than the life-expectancy mark.
Disease Prevalence
| Disease / Condition | St. Mary's County | Maryland Avg | US Average |
|---|---|---|---|
| Diabetes | 9.5% | 10.6% | 11.3% |
| Cancer | 5.9% | 6.7% | 6.9% |
| Heart Diseases | 5.3% | 6.0% | 7.1% |
| Adult Obesity | 36.8% | 34.0% | 34.3% |
On average, diseases in St. Mary's County are about the same as in Maryland.
Health Behaviors
| Behavior | St. Mary's County | Maryland Avg | US Average |
|---|---|---|---|
| Smokers | 16.7% | 15.9% | 19.0% |
| Binge Drinking | 15.9% | 14.9% | 16.5% |
| Sedentary Lifestyle | 21.5% | 22.9% | 25.1% |
On average, health behaviors in St. Mary's County are about the same as in Maryland.
Assuming each smoker smokes 10 cigarettes a day, that's about 145,980 cigarettes a day, 4.4 million a month, or 53.3 million a year! At 11 minutes* of life lost per cigarette, that's about 1.6 million minutes a day and 586.1 million a year lost to smoking overall - and since life expectancy in St. Mary's County is 80.8 years, that's roughly equivalent to 0.04 lifetimes a day, or 14 lifetimes a year.
* Source: Shaw M, Mitchell R, Dorling D. "Time for a smoke? One cigarette reduces your life by 11 minutes." BMJ. 2000;320:53.
Illustrative only. This is not an estimate of how many people actually die from smoking each day or year - it's a rough, order-of-magnitude comparison meant to help grasp the scale of smoking in this area. We take no responsibility for any decisions made based on this figure.
Air Quality
| Metric | St. Mary's County | Maryland Avg | US Average |
|---|---|---|---|
| Air Pollution (μg/m³) | 5.52 | 5.95 | 6.09 |
With an annual average of 5.5 µg/m³ of fine particulate matter (PM2.5), air quality in St. Mary's County is good — generally safe air quality for the vast majority of residents.
St. Mary's County, MD Health 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 uninsured, at 3.9%, runs 30% below the 5.5% typical of the counties around it. That is the better end of the local range on this measure.
The counties themselves spread 5.1% on uninsured, 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 lowest uninsured of the 6 areas compared here.
| Area | Population | Life expectancy | Uninsured | Obesity |
|---|---|---|---|---|
| St. Mary's County, MD | 115,126 | 80.8 yrs #2/6 | 3.9% #2/6 | 36.8% #3/6 |
| Westmoreland County, VA | 18,825 | 76.9 yrs | 8.2% | 40.6% |
| Calvert County, MD | 94,313 | 80.8 yrs | 3.0% | 35.3% |
| Richmond County, VA | 9,095 | 78.2 yrs | 5.2% | 40.0% |
| Northumberland County, VA | 12,188 | 78.6 yrs | 6.6% | 36.0% |
| Dorchester County, MD | 32,754 | 77.6 yrs | 5.5% | 39.0% |
Conclusion
Considering all these factors, St. Mary's County, Maryland has an overall health 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 health in St. Mary's County, Maryland.
What is the health grade for St. Mary's County, Maryland?
St. Mary's County, Maryland has a Map AI Health Index grade of B, based on life expectancy, disease rates, healthcare access, and the physical environment; a B grade means residents are somewhat healthier than the U.S. average.
Is St. Mary's County, Maryland one of the healthiest counties in Maryland?
St. Mary's County ranks 9th healthiest out of 24 counties in Maryland by the Map AI Health Index, which measures life expectancy, disease rates, healthcare access, and the physical environment.
What is the life expectancy in St. Mary's County, Maryland?
People in St. Mary's County, Maryland can expect to live 80.8 years on average, 2.3 years longer than the Maryland average of 78.4.
What percentage of St. Mary's County, Maryland residents are uninsured?
3.9% of residents in St. Mary's County, Maryland have no health insurance, about 1 in 26 people, 2.4 points below the Maryland rate of 6.3%.
What percentage of St. Mary's County, Maryland residents are obese?
36.8% of adults in St. Mary's County, Maryland are classified as obese, about 1 in 3, 2.9 points above the Maryland rate of 34.0%.
How many cigarettes do smokers in St. Mary's County, Maryland go through, and how much life does that cost?
Assuming each smoker smokes 10 cigarettes a day, that's about 145,980 cigarettes a day, 4.4 million a month, or 53.3 million a year! At 11 minutes* of life lost per cigarette, that's about 1.6 million minutes a day and 586.1 million a year lost to smoking overall - and since life expectancy in St. Mary's County is 80.8 years, that's roughly equivalent to 0.04 lifetimes a day, or 14 lifetimes a year.
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