Real estate · County · Maryland
Real estate businesses in St. Mary’s County, MD
Competitor counts, household spending and official business counts for real estate businesses in St. Mary’s County, MD, set against other counties and the U.S.
Groundwork market score · out of 100
Score 53 out of 100: Upper middle
Ranked #936 of 2,229 scored counties
#6 of 24 scored counties in Maryland
- Listings
- 130
- 11 chain locations (8%)
- Official establishments
- 74
- +23.3% since 2019
- Household spending a year
- $779.4M
- On rent and homeowner costs · $18,366 a household
- Housing spending per listing (U.S. = 100)
- 138
- 38% above the U.S.
- Listings per 10k households
- 30.6
- 21% below the U.S.
- Population, 2025
- 116,692
- +2.4% since 2020
See the real estate businesses around any address in St. Mary’s County
The site report maps the real estate businesses on map listings near the address, by name and distance, and sizes the households and spending around it. 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
At $18,366 per household (10% above the U.S. average), households in St. Mary’s County spend about $779.4M a year on rent and homeowner costs. Housing spending per office is 38% above the U.S. figure. The spending figure is all rent and homeowner costs, a measure of housing demand, not money real estate businesses take in.
There are 130 real estate businesses on map listings in St. Mary’s County as of September 2026. 11 of them (8%) are chain locations, against 6% across the U.S. That is 30.6 per 10,000 households, 21% below the U.S. rate of 38.5.
The official count of businesses with payroll classed as real estate agents, property managers, mortgage lenders and inspectors in St. Mary’s County was 74 in 2023, up 23.3% from 2019. That is one for every 573 households, against one for every 414 across the U.S. Official counts also show 458 one-person businesses without payroll.
Population estimates put the population change in St. Mary’s County from 2020 to 2025 at +2.4%, slower than the U.S. (+3.1%). The Groundwork market score for real estate businesses in St. Mary’s County is 53 (upper middle), #936 of 2,229 scored counties and #6 of 24 scored counties in Maryland.
How St. Mary’s County compares
The same measures for Maryland and the whole U.S. Housing spending per listing divides all rent and homeowner costs by the listings counted: a measure of housing demand for each business, not money any of them take in, so it is shown against the U.S. (100) only. Households per establishment divides households by the official count.
| Measure | St. Mary’s County | Maryland | U.S. |
|---|---|---|---|
| Listings per 10k households | 30.6 | 40.4 | 38.5 |
| Housing spending per listing (U.S. = 100) | 138 | 100 | 100 |
| Households per official establishment | 573 | 454 | 414 |
| Official establishment growth, 2019–2023 | +23.3% | +9.2% | +15.8% |
| Population growth, 2020–2025 | +2.4% | +1.4% | +3.1% |
| Spending per household on rent and homeowner costs | $18,366 | $17,488 | $16,661 |
| Median household income | $119,446 | $103,678 | $80,734 |
| Groundwork market score | 53 | 44 |
Official counts and lending
Businesses
- Official establishments, 2019 to 2023
- 60 → 74+23.3% over the period
- Employees, 2023
- 168
- Annual payroll, 2023
- $11M
- One-person businesses, 2023
- 458Businesses with no payroll
- Map listings, September 2026
- 13011 chain locations
- Listings at the U.S. rate for this spending
- 180The U.S. ratio of listings to household spending, applied here
SBA-backed loans since fiscal 2022
- Loans
- 0
- Amount
- $0
SBA-backed loans to businesses classed as real estate agents, property managers, mortgage lenders and inspectors in St. Mary’s County, through June 2026, placed by the borrower’s ZIP code. Official establishments are businesses with payroll; the official counts leave out places with fewer than 3.
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 real estate businesses on map listings by name and distance.
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 cardReal estate across Maryland
Every Maryland market ranked →The highest-scoring counties in Maryland for real estate businesses, numbered among those based in Maryland, with St. Mary’s County marked.
Top counties in Maryland
| Market | Score | Listings | Per 10k households | Housing spending per listing (U.S. = 100) | Population growth | U.S. rank |
|---|---|---|---|---|---|---|
| 1Caroline County, MD | 66 | 16 | 12.8 | 262 | +2.5% | #333 of 2,229 |
| 2Somerset County, MD | 64 | 10 | 12.0 | 263 | +1.7% | #398 of 2,229 |
| 3Cecil County, MD | 56 | 105 | 25.9 | 145 | +3.2% | #783 of 2,229 |
| 4Allegany County, MD | 55 | 46 | 16.8 | 186 | −1.6% | #818 of 2,229 |
| 5Charles County, MD | 55 | 250 | 41.1 | 104 | +5.9% | #842 of 2,229 |
| 6St. Mary’s County, MD | 53 | 130 | 30.6 | 138 | +2.4% | #936 of 2,229 |
| 7Prince George’s County, MD | 53 | 1,006 | 28.9 | 137 | +0.5% | #937 of 2,229 |
| 8Dorchester County, MD | 52 | 28 | 20.7 | 158 | +3.4% | #983 of 2,229 |
| 9Carroll County, MD | 50 | 196 | 30.5 | 139 | +2.2% | #1,082 of 2,229 |
| 10Frederick County, MD | 50 | 467 | 44.6 | 97 | +11.0% | #1,108 of 2,229 |
Other business types in St. Mary’s County
Each with its Groundwork market score here, out of 100, where it has one.
Food and drink
Groceries and convenience
Auto
Beauty and personal care
Fitness and classes
Health care
Child care
Clothing and laundry
Home services
Real estate
Funeral services
Questions
How many real estate businesses are in St. Mary’s County, MD?
As of September 2026, map listings count 130 real estate businesses in St. Mary’s County. 11 of them (8%) are chain locations. The listings count real estate agents and brokers, property managers, mortgage brokers and lenders, and home inspectors. Official counts show 74 businesses with payroll classed as real estate agents, property managers, mortgage lenders and inspectors in 2023, up 23.3% from 2019. Another 458 one-person businesses have no payroll, by official counts.
How much do households in St. Mary’s County, MD spend on rent and homeowner costs?
About $779.4M a year, or $18,366 per household. That is 10% above the U.S. average (an index of 110, where 100 is the U.S. average). For the 130 real estate businesses on map listings, housing spending per office is 38% above the U.S. figure. That figure is all rent and homeowner costs, used as a measure of housing demand; it is not money real estate businesses take in. It is estimated from the incomes of the 42,436 households in St. Mary’s County and national spending patterns by income.
How does St. Mary’s County, MD compare with the U.S. for real estate businesses?
St. Mary’s County has 30.6 real estate businesses per 10,000 households, 21% below the U.S. rate of 38.5. The index of housing spending per office is 138, where 100 is the U.S. At the U.S. ratio of real estate businesses to household spending, St. Mary’s County would have about 180, against 130 on map listings. There is one business with payroll in the industry for every 573 households, against one for every 414 across the U.S. The official count rose 23.3% from 2019 to 2023, against +15.8% for the U.S.
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 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.
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. St. Mary’s County scores 53 for real estate businesses (upper middle), #936 of 2,229 scored 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 real estate businesses 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.
How the score works · Top markets for real estate businesses · All 56 business types in St. Mary’s County
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.