Health care · County · Washington
Medical and dental practices in King County, WA
Competitor counts, household spending and official business counts for medical and dental practices in King County, WA, set against other counties and the U.S.
Groundwork market score · out of 100
Score 45 out of 100: Lower middle
Ranked #1,436 of 2,394 scored counties
#29 of 35 scored counties in Washington
- Listings
- 9,838
- 721 chain locations (7%)
- Official establishments
- 3,758
- −0.2% since 2019
- Household spending a year
- $1.5B
- On medical and dental services · $1,632 a household
- Spending per listing
- $156K
- 2% above the U.S.
- Listings per 10k households
- 104.5
- 24% above the U.S.
- Population, 2025
- 2,344,939
- +3.1% since 2020
See the medical and dental practices around any address in King County
The site report maps the medical and dental practices 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 King 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
As of September 2026, map listings count 9,838 medical and dental practices in King County. Of those, 721 are chain locations, or 7%, against 11% across the U.S. That is 104.5 per 10,000 households, 24% above the U.S. rate of 84.5.
Household spending on medical and dental services in King County comes to about $1.5B a year: $1,632 per household, 27% above the U.S. average. That is about $156K of household spending for each practice on map listings, 2% above the U.S. figure of $152K.
In 2023, official counts showed 3,758 businesses with payroll in King County classed as offices of physicians, dentists, chiropractors, optometrists and therapists, and urgent care centers, down 0.2% from 2019. That is one for every 250 households, against one for every 270 across the U.S. Official counts also show 2,138 one-person businesses without payroll. Since fiscal 2022, 51 SBA-backed loans worth $39M have gone to businesses classed as offices of physicians, dentists, chiropractors, optometrists and therapists, and urgent care centers in King County.
Between 2020 and 2025, the population of King County grew 3.1%, in step with the U.S. (+3.1%). The Groundwork market score for medical and dental practices in King County is 45 (lower middle), #1,436 of 2,394 scored counties and #29 of 35 scored counties in Washington.
How King County compares
The same measures for Washington and the whole U.S. Spending per listing divides a year of household spending on all medical and dental services by the medical and dental practices counted, so it measures the demand for each competitor, not any business’s revenue. Households per establishment does the same with the official count.
| Measure | King County | Washington | U.S. |
|---|---|---|---|
| Listings per 10k households | 104.5 | 79.3 | 84.5 |
| Spending per listing | $156K | $182K | $152K |
| Households per official establishment | 250 | 305 | 270 |
| Official establishment growth, 2019–2023 | −0.2% | +0.2% | +1.5% |
| Population growth, 2020–2025 | +3.1% | +3.6% | +3.1% |
| Spending per household on medical and dental services | $1,632 | $1,446 | $1,288 |
| Median household income | $124,746 | $98,141 | $80,734 |
| Groundwork market score | 45 | 75 |
Official counts and lending
Businesses
- Official establishments, 2019 to 2023
- 3,764 → 3,758−0.2% over the period
- Employees, 2023
- 43,195
- Annual payroll, 2023
- $3.6B
- One-person businesses, 2023
- 2,138Businesses with no payroll
- Map listings, September 2026
- 9,838721 chain locations
- Listings at the U.S. rate for this spending
- 10,074The U.S. ratio of listings to household spending, applied here
SBA-backed loans since fiscal 2022
- Loans
- 51
- Amount
- $39M
SBA-backed loans to businesses classed as offices of physicians, dentists, chiropractors, optometrists and therapists, and urgent care centers in King 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 King County
- Population, 2025 estimate
- 2,344,939+3.1% since 2020
- Households
- 941,054
- Median age
- 38.8
- Homes lived in by their owners
- 55%
- Vehicles per household
- 1.6
- Land area
- 2,116 sq. mi.
- People per square mile
- 1,081
- Median household income
- $124,746+31.4% vs. 2015–2019, before inflation
- Average household income
- $176,807
- Median home value
- $859,900
- Jobs located here
- 1,503,962
- Daytime population
- 2,645,877Residents who don’t work, plus everyone whose job is here
Looking at a specific site in King 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 medical and dental practices on map listings by name and distance.
Or open the report at the center of King County. Signed out, you see a blurred preview; on an account, each report is one action.
Free10 actions over 3 days, no cardDoctors, dentists and clinics across Washington
Every Washington market ranked →The highest-scoring counties in Washington for medical and dental practices, numbered among those based in Washington, with King County marked.
Top counties in Washington
| Market | Score | Listings | Per 10k households | Spending per listing | Population growth | U.S. rank |
|---|---|---|---|---|---|---|
| 1Skamania County, WA | 88 | 14 | 27.9 | $495K | +5.2% | #10 of 2,394 |
| 2Douglas County, WA | 87 | 36 | 22.6 | $587K | +8.0% | #17 of 2,394 |
| 3Mason County, WA | 85 | 69 | 26.5 | $490K | +7.8% | #34 of 2,394 |
| 4Lincoln County, WA | 83 | 15 | 31.1 | $386K | +9.7% | #64 of 2,394 |
| 5Klickitat County, WA | 81 | 36 | 36.5 | $341K | +6.6% | #91 of 2,394 |
| 6Pacific County, WA | 80 | 33 | 30.1 | $392K | +3.6% | #102 of 2,394 |
| 7Pend Oreille County, WA | 78 | 19 | 31.9 | $374K | +7.1% | #123 of 2,394 |
| 8Franklin County, WA | 73 | 114 | 38.1 | $350K | +5.6% | #255 of 2,394 |
| 9Grant County, WA | 72 | 142 | 40.1 | $302K | +6.3% | #290 of 2,394 |
| 10Adams County, WA | 69 | 25 | 39.8 | $295K | +4.3% | #379 of 2,394 |
| 29King County, WA | 45 | 9,838 | 104.5 | $156K | +3.1% | #1,436 of 2,394 |
Other business types in King 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
- Doctors, dentists and clinics45
- Dentists and orthodontists39
- Primary care and pediatrics71
- Urgent care and walk-in clinics80
- Chiropractors56
- Physical therapy59
- Optometrists and eye care65
Child care
Clothing and laundry
Home services
Real estate
Funeral services
Questions
How many medical and dental practices are in King County, WA?
King County has 9,838 medical and dental practices on map listings as of September 2026. 721 of them (7%) are chain locations. The listings count every outpatient clinic and practice, and urgent care. Official counts show 3,758 businesses with payroll classed as offices of physicians, dentists, chiropractors, optometrists and therapists, and urgent care centers in 2023, down 0.2% from 2019. Another 2,138 one-person businesses have no payroll, by official counts.
How much do households in King County, WA spend on medical and dental services?
About $1.5B a year, or $1,632 per household. That is 27% above the U.S. average (an index of 127, where 100 is the U.S. average). Spread across the 9,838 medical and dental practices on map listings, it comes to $156K per practice. It is estimated from the incomes of the 941,054 households in King County and national spending patterns by income.
How does King County, WA compare with the U.S. for medical and dental practices?
King County has 104.5 medical and dental practices per 10,000 households, 24% above the U.S. rate of 84.5. Spending per practice is $156K, 2% above the U.S. figure of $152K. At the national ratio of medical and dental practices to household spending, King County would have about 10,074, against 9,838 on map listings. There is one business with payroll in the industry for every 250 households, against one for every 270 across the U.S. The official count fell 0.2% from 2019 to 2023, against +1.5% for the U.S.
How fast is King County, WA growing?
Population estimates put King County at 2,344,939 people in 2025, up 3.1% since 2020, in step with the U.S. (+3.1%). It has 941,054 households. Median household income in King County is $124,746, 55% above the U.S. median of $80,734. Against the 2015–2019 survey, the median rose 31.4%, 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. King County scores 45 for medical and dental practices (lower middle), #1,436 of 2,394 scored counties.
How can I see the market around a specific site?
Run a Groundwork site report on an address in King County. It maps the medical and dental practices 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 medical and dental practices · All 56 business types in King County
Screening a site or an acquisition in King 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 King 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.