County profile · Maryland
St. Mary’s County, MD market data
How St. Mary’s County compares with other counties for 56 business types: competitors, household spending, official counts and growth.
- Population, 2025
- 116,692
- +2.4% since 2020
- Households
- 42,436
- Median household income
- $119,446
- +33.0% vs. 2015–2019, before inflation
- Median home value
- $407,600
- Jobs located here
- 35,732
- Highest market score
- 88
- Clothing and shoe stores, #41 of 2,087 scored counties
A site report maps the competitors on map listings around any address in St. Mary’s County by name and distance, and the households and spending within reach. Or open the report at the center of St. Mary’s County. Signed out, you see a blurred preview; on an account, each report is one action.
Free10 actions over 3 days, no cardSurvey estimates 2020–2024 · population estimates 2025 · official business counts 2023 · map listings September 2026 · Data credits · How we measure
What this means
St. Mary’s County has an estimated 116,692 people and 42,436 households. Between 2020 and 2025, the population of St. Mary’s County grew 2.4%, slower than the U.S. (+3.1%). Median household income in St. Mary’s County is $119,446, 48% above the U.S. median of $80,734. Against the 2015–2019 survey, the median rose 33.0%, before inflation.
Relative to the U.S., household spending in St. Mary’s County runs highest on vehicle insurance (an index of 142, where 100 is the U.S. average) and lowest on medical and dental services (109, still above the U.S.).
Of the business types scored in St. Mary’s County, clothing and shoe stores (88), insurance agencies (87) and chiropractors (86) have the highest Groundwork market scores. For clothing and shoe stores, that ranks #41 of 2,087 scored counties.
St. Mary’s County is part of the Lexington Park metro area. Against the U.S., map listings per household run highest for urgent care and walk-in clinics (9.4 times the U.S. rate) and lowest for spas and skin care studios (67% below the U.S. rate).
All 56 business types in St. Mary’s County
Highest Groundwork market score first. Each score compares St. Mary’s County with other counties for that business type, from 0 to 100. Spending per listing divides a whole spending line (all vehicle repairs, all eating out) by one type’s listings: the demand for each competitor, not a business’s revenue. Compare it across markets with its index, where 100 is the U.S. figure for the same type; the real estate types, whose line is all housing costs, show the index only. How the score works.
| Business type | Score | Rank among counties | Listings | Per 10k households | Spending per listing | Spending per listing vs. U.S. (100) | Official establishments |
|---|---|---|---|---|---|---|---|
| Clothing and shoe stores | 88 | #41 of 2,087 | 32 | 7.5 | $3.2M | 254 | 6 |
| Insurance agencies | 87 | #98 of 2,272 | 34 | 8.0 | $3.5M | 276 | 22 |
| Chiropractors | 86 | #13 of 1,490 | 8 | 1.9 | $7.5M | 311 | 6 |
| Clothing, shoes and laundry | 85 | #72 of 2,210 | 50 | 11.8 | $2.1M | 234 | 10 |
| Gas stations | 84 | #83 of 2,358 | 31 | 7.3 | $4.5M | 190 | 33 |
| Spas and skin care | 82 | #46 of 1,769 | 16 | 3.8 | $3M | 345 | 7 |
| Coffee shops and cafes | 81 | #85 of 2,063 | 21 | 4.9 | $10M | 269 | 19 |
| Roofing and gutters | 79 | #63 of 1,177 | 15 | 3.5 | $10.3M | 122 | 5 |
| Laundromats | 79 | #71 of 785 | 5 | 1.2 | $20.6M | 165 | Under 3 |
| Collision repair and body shops | 79 | #74 of 1,327 | 8 | 1.9 | $5.8M | 189 | 9 |
| Gyms | 78 | #84 of 1,792 | 21 | 4.9 | $2.3M | 179 | 11 |
| Sit-down restaurants | 78 | #165 of 2,405 | 202 | 47.6 | $1M | 156 | 62 |
| Convenience stores | 78 | #226 of 2,261 | 33 | 7.8 | $9M | 115 | 9 |
| Grocery stores | 78 | #234 of 2,070 | 26 | 6.1 | $11.5M | 123 | 13 |
| Yoga, Pilates and fitness studios | 77 | #32 of 777 | 5 | 1.2 | $9.8M | 241 | 11 |
| Optometrists and eye care | 77 | #95 of 1,302 | 13 | 3.1 | $4.6M | 146 | 6 |
| Bakeries and dessert shops | 77 | #126 of 1,889 | 28 | 6.6 | $7.5M | 180 | 22 |
| Primary care and pediatrics | 77 | #126 of 1,656 | 21 | 4.9 | $2.8M | 159 | 32 |
| Grocery and convenience stores | 77 | #249 of 2,402 | 78 | 18.4 | $3.8M | 113 | 22 |
| Pet grooming and boarding | 76 | #105 of 1,461 | 17 | 4.0 | $3M | 118 | 8 |
| Martial arts and dance studios | 75 | #76 of 1,334 | 14 | 3.3 | $3.5M | 173 | 10 |
| Property management | 75 | #77 of 910 | 6 | 1.4 | Index only | 234 | 16 |
| Restaurants and cafes | 75 | #234 of 2,405 | 345 | 81.3 | $606K | 163 | 171 |
| Gyms, studios and classes | 74 | #150 of 2,088 | 40 | 9.4 | $1.2M | 185 | 21 |
| Veterinarians | 74 | #196 of 1,485 | 15 | 3.5 | $3.4M | 125 | 12 |
| Mortgage brokers and lenders | 73 | #80 of 887 | 11 | 2.6 | Index only | 182 | 5 |
| Auto repair shops | 73 | #262 of 2,378 | 78 | 18.4 | $598K | 134 | 37 |
| Landscaping and lawn care | 72 | #203 of 1,493 | 27 | 6.4 | $2.9M | 100 | 32 |
| Pizza | 72 | #240 of 2,090 | 26 | 6.1 | $8M | 158 | 89 |
| Pet businesses | 71 | #247 of 2,200 | 52 | 12.3 | $982K | 112 | 24 |
| Car washes and detailing | 69 | #259 of 1,451 | 17 | 4.0 | $2.7M | 109 | 6 |
| Fast food and sandwich shops | 69 | #392 of 2,222 | 50 | 11.8 | $4.2M | 137 | 89 |
| Physical therapy | 68 | #265 of 1,422 | 23 | 5.4 | $2.6M | 108 | 11 |
| Funeral homes | 68 | #274 of 1,472 | 5 | 1.2 | $1.1M | 160 | 3 |
| Dentists and orthodontists | 68 | #313 of 1,886 | 37 | 8.7 | $1.6M | 164 | 31 |
| Auto repair and car care | 68 | #438 of 2,401 | 152 | 35.8 | $307K | 114 | 55 |
| Lawn, cleaning and pest control | 67 | #291 of 1,771 | 42 | 9.9 | $1.9M | 112 | 63 |
| Barbershops | 66 | #314 of 1,356 | 22 | 5.2 | $2.2M | 117 | Under 3 |
| House cleaning | 64 | #169 of 847 | 11 | 2.6 | $7.2M | 112 | 26 |
| Child care and preschools | 64 | #428 of 1,611 | 31 | 7.3 | $998K | 100 | 25 |
| Hair salons | 64 | #488 of 2,339 | 83 | 19.6 | $582K | 135 | 31 |
| Doctors, dentists and clinics | 64 | #592 of 2,394 | 257 | 60.6 | $232K | 152 | 89 |
| Salons, barbers and spas | 63 | #532 of 2,385 | 152 | 35.8 | $318K | 150 | 47 |
| Pet stores | 61 | #302 of 974 | 12 | 2.8 | $4.3M | 94 | 4 |
| Electricians | 59 | #389 of 1,160 | 16 | 3.8 | $9.7M | 80 | 28 |
| Nail salons | 57 | #488 of 1,328 | 28 | 6.6 | $1.7M | 103 | 9 |
| Tire shops | 54 | #683 of 1,530 | 21 | 4.9 | $2.2M | 89 | 9 |
| Real estate agents and brokers | 54 | #842 of 2,176 | 110 | 25.9 | Index only | 130 | 38 |
| Real estate | 53 | #936 of 2,229 | 130 | 30.6 | Index only | 138 | 74 |
| Home repair trades | 51 | #994 of 2,057 | 77 | 18.1 | $2M | 83 | 85 |
| HVAC and plumbing | 44 | #1,079 of 1,707 | 46 | 10.8 | $3.4M | 71 | 52 |
| Urgent care and walk-in clinics | 38 | #240 of 325 | 20 | 4.7 | $3M | 12 | 3 |
| Pest control | Not scored | Not scored | 4 | 0.9 | $19.7M | 193 | 5 |
| Home inspectors | Not scored | Not scored | 3 | 0.7 | Index only | 99 | 5 |
| Dry cleaners | Not scored | Not scored | 1 | 0.2 | $103.1M | Too few | 4 |
| Oil change and quick lube | Not scored | Not scored | 0 | 0.0 | None listed | None listed | Under 3 |
Household spending in St. Mary’s County
What households here spend in a year on each line, in total and per household, with the index against the U.S. average (100).
| Spending line | A year, all households | Per household | Index vs. U.S. (100) |
|---|---|---|---|
| Vehicle maintenance and repairs | $46.6M | $1,099 | 115 |
| Gasoline and other fuels | $140.3M | $3,307 | 127 |
| Food away from home | $209.1M | $4,927 | 121 |
| Groceries | $297.9M | $7,019 | 111 |
| Personal care products and services | $48.3M | $1,139 | 113 |
| Child care and other personal services | $30.9M | $729 | 126 |
| Memberships, classes and admissions | $48.9M | $1,152 | 117 |
| Medical and dental services | $59.6M | $1,405 | 109 |
| Pets | $51.1M | $1,204 | 132 |
| Clothing, shoes and related services | $103.1M | $2,430 | 118 |
| Vehicle insurance | $118M | $2,781 | 142 |
| Home repairs, maintenance and insurance | $154.4M | $3,639 | 121 |
| Lawn care, cleaning and other household services | $78.9M | $1,860 | 132 |
| Rent and homeowner costs | $779.4M | $18,366 | 110 |
Household spending is estimated from the incomes of the households in each neighborhood, using what households at each income spent nationally in 2024, adjusted for the region. It counts what residents spend, wherever they spend it.
Population and households in St. Mary’s County
- Population, 2025 estimate
- 116,692+2.4% since 2020
- Households
- 42,436
- Median age
- 38.0
- Homes lived in by their owners
- 73%
- Vehicles per household
- 2.1
- Land area
- 359 sq. mi.
- People per square mile
- 321
- Median household income
- $119,446+33.0% vs. 2015–2019, before inflation
- Average household income
- $142,976
- Median home value
- $407,600
- Jobs located here
- 35,732
- Daytime population
- 104,060Residents who don’t work, plus everyone whose job is here
Looking at a specific site in St. Mary’s County?
These figures cover the whole county. A site report draws rings around one address and counts what’s inside them: households, spending, jobs, and the competitors on map listings by name and distance, for any of the 56 business types.
Or open the report at the center of St. Mary’s County. Signed out, you see a blurred preview; on an account, each report is one action.
Free10 actions over 3 days, no cardRelated markets
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Questions
How fast is St. Mary’s County, MD growing?
Population estimates put St. Mary’s County at 116,692 people in 2025, up 2.4% since 2020, slower than the U.S. (+3.1%). It has 42,436 households. Median household income rose 33.0% from the 2015–2019 survey, before inflation.
How much do households in St. Mary’s County, MD spend?
Households in St. Mary’s County spend about $779.4M a year on rent and homeowner costs, $297.9M on groceries and $209.1M on food away from home. Set against the U.S., households in St. Mary’s County spend the most on vehicle insurance (an index of 142, where 100 is the U.S. average) and the least on medical and dental services (109, still above the U.S.).
Which business types have the highest market scores in St. Mary’s County, MD?
The highest Groundwork market scores in St. Mary’s County are for clothing and shoe stores (88), insurance agencies (87) and chiropractors (86). St. Mary’s County ranks #41 of 2,087 scored counties for clothing and shoe stores.
How does St. Mary’s County, MD compare with the U.S.?
The median household income in St. Mary’s County is $119,446 a year, 48% above the U.S. median of $80,734. The population rose 2.4% from 2020 to 2025, against +3.1% for the U.S. The median home value is $407,600, against $332,700 for the U.S. For its number of households, St. Mary’s County has the most map listings, relative to the U.S., for urgent care and walk-in clinics (9.4 times the U.S. rate) and the fewest for spas and skin care studios (67% below the U.S. rate).
What is the Groundwork market score?
The Groundwork market score runs from 0 to 100 and compares a market with others of its kind for one business type: states with states, metro areas with metro areas, small-town markets and counties with their own. It weighs household spending per competitor (35%), households per business with payroll (25%), population growth (20%) and spending power (20%), each ranked against those peers. A higher score means that, taken together, the market has more household spending and more households for each business already there, faster population growth and more spending per household than similar markets. It describes a market, not any one site or deal. 52 of the 56 business types have a score in St. Mary’s County, each ranked against other counties.
How can I see the market around a specific site?
Run a Groundwork site report on an address in St. Mary’s County. It maps the competitors on map listings near the site and sizes the households and spending within the distance you choose. New accounts get 10 actions over 3 days, no card.
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Screening a site or an acquisition in St. Mary’s County?
A site report maps the competitors on map listings near an address and sizes the households and spending around it.
The button opens the report at the center of St. Mary’s County. Signed out, you see a blurred preview; on an account, each report is one action.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.
Figures are estimates for research only. Not investment or real estate advice.