Health care · County · California
Urgent care and walk-in clinics in San Mateo County, CA
How San Mateo County, CA compares with other counties and the U.S. for urgent care and walk-in clinics: competitors, household spending, official counts and growth.
Groundwork market score · out of 100
Score 78 out of 100: High
Ranked #11 of 325 scored counties
#1 of 21 scored counties in California
- Listings
- 9
- 2 chain locations (22%)
- Official establishments
- 11
- Businesses with payroll, 2023
- Household spending a year
- $475M
- On medical and dental services · $1,797 a household
- Spending per listing
- $52.8M
- 2.2 times the U.S.
- Listings per 10k households
- 0.3
- 40% below the U.S.
- Population, 2025
- 743,568
- −2.5% since 2020
See the urgent care and walk-in clinics around any address in San Mateo County
The site report maps the urgent care and walk-in clinics 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 San Mateo 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
For urgent care and walk-in clinics, San Mateo County has a Groundwork market score of 78 (high): #11 of 325 scored counties and #1 of 21 scored counties in California. That puts it in the top 10% of counties for urgent care and walk-in clinics.
As of September 2026, map listings count 9 urgent care and walk-in clinics in San Mateo County. 2 of them (22%) are chain locations, against 24% across the U.S. That comes to 0.3 for every 10,000 households, 40% below the U.S. rate of 0.5.
Household spending on medical and dental services in San Mateo County comes to about $475M a year: $1,797 per household, 39% above the U.S. average. Spread across 9 urgent care and walk-in clinics, that is $52.8M per clinic, 2.2 times the U.S. figure of $24.5M. That spending covers all medical and dental services, which urgent care and walk-in clinics share with other businesses in the trade.
Official counts show 11 businesses with payroll classed as freestanding emergency and urgent care centers in San Mateo County in 2023. That is one for every 24,038 households, against one for every 12,867 across the U.S. Between 2020 and 2025, the population of San Mateo County declined 2.5%, against +3.1% for the U.S.
How San Mateo County compares
The same measures for California and the whole U.S. Spending per listing divides a year of household spending on all medical and dental services by the urgent care and walk-in clinics 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 | San Mateo County | California | U.S. |
|---|---|---|---|
| Listings per 10k households | 0.3 | 0.6 | 0.5 |
| Spending per listing | $52.8M | $23.8M | $24.5M |
| Households per official establishment | 24,038 | 11,078 | 12,867 |
| Official establishment growth, 2019–2023 | n/a | +48.8% | +32.0% |
| Population growth, 2020–2025 | −2.5% | −0.4% | +3.1% |
| Spending per household on medical and dental services | $1,797 | $1,464 | $1,288 |
| Median household income | $158,855 | $99,122 | $80,734 |
| Groundwork market score | 78 | 39 |
Official counts and lending
Businesses
- Official establishments, 2019 to 2023
- 10 → 11
- Employees, 2023
- 576
- Annual payroll, 2023
- $54.6M
- One-person businesses, 2023
- Not publishedNot published for this business type
- Map listings, September 2026
- 92 chain locations
- Listings at the U.S. rate for this spending
- 19The 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 freestanding emergency and urgent care centers in San Mateo 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 San Mateo County
- Population, 2025 estimate
- 743,568−2.5% since 2020
- Households
- 264,419
- Median age
- 41.8
- Homes lived in by their owners
- 58%
- Vehicles per household
- 1.9
- Land area
- 449 sq. mi.
- People per square mile
- 1,655
- Median household income
- $158,855+29.5% vs. 2015–2019, before inflation
- Average household income
- $231,822
- Median home value
- $1,559,600
- Jobs located here
- 425,111
- Daytime population
- 795,447Residents who don’t work, plus everyone whose job is here
Looking at a specific site in San Mateo 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 urgent care and walk-in clinics on map listings by name and distance.
Or open the report at the center of San Mateo County. Signed out, you see a blurred preview; on an account, each report is one action.
Free10 actions over 3 days, no cardUrgent care and walk-in clinics across California
Every California market ranked →The highest-scoring counties in California for urgent care and walk-in clinics, numbered among those based in California, with San Mateo County marked.
Top counties in California
| Market | Score | Listings | Per 10k households | Spending per listing | Population growth | U.S. rank |
|---|---|---|---|---|---|---|
| 1San Mateo County, CA | 78 | 9 | 0.3 | $52.8M | −2.5% | #11 of 325 |
| 2Contra Costa County, CA | 77 | 10 | 0.2 | $68M | +0.3% | #15 of 325 |
| 3Alameda County, CA | 76 | 19 | 0.3 | $52.1M | −2.6% | #19 of 325 |
| 4Santa Clara County, CA | 76 | 34 | 0.5 | $35.3M | −0.9% | #20 of 325 |
| 5San Francisco County, CA | 72 | 18 | 0.5 | $34.3M | −5.6% | #34 of 325 |
| 6Placer County, CA | 72 | 9 | 0.6 | $27.4M | +8.9% | #37 of 325 |
| 7Sacramento County, CA | 68 | 23 | 0.4 | $34.4M | +2.0% | #49 of 325 |
| 8Riverside County, CA | 66 | 32 | 0.4 | $33.8M | +5.0% | #57 of 325 |
| 9Santa Cruz County, CA | 66 | 5 | 0.5 | $30M | −4.7% | #59 of 325 |
| 10Sonoma County, CA | 66 | 12 | 0.6 | $23.8M | −0.4% | #60 of 325 |
Other business types in San Mateo 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 clinics40
- Dentists and orthodontists27
- Primary care and pediatrics54
- Urgent care and walk-in clinics78
- Chiropractors57
- Physical therapy66
- Optometrists and eye care62
Child care
Clothing and laundry
Home services
Real estate
Funeral services
Questions
How many urgent care and walk-in clinics are in San Mateo County, CA?
San Mateo County has 9 urgent care and walk-in clinics on map listings as of September 2026. 2 of them (22%) are chain locations. The listings count urgent care and walk-in clinics. Official counts show 11 businesses with payroll classed as freestanding emergency and urgent care centers in 2023.
How much do households in San Mateo County, CA spend on medical and dental services?
About $475M a year, or $1,797 per household. That is 39% above the U.S. average (an index of 139, where 100 is the U.S. average). Spread across the 9 urgent care and walk-in clinics on map listings, it comes to $52.8M per clinic. The spending figure covers all medical and dental services, not only urgent care and walk-in clinics. It is estimated from the incomes of the 264,419 households in San Mateo County and national spending patterns by income.
How does San Mateo County, CA compare with the U.S. for urgent care and walk-in clinics?
San Mateo County has 0.3 urgent care and walk-in clinics per 10,000 households, 40% below the U.S. rate of 0.5. Spending per clinic is $52.8M, 2.2 times the U.S. figure of $24.5M. At the national ratio of urgent care and walk-in clinics to household spending, San Mateo County would have about 19, against 9 on map listings. There is one business with payroll in the industry for every 24,038 households, against one for every 12,867 across the U.S.
How fast is San Mateo County, CA growing?
Population estimates put San Mateo County at 743,568 people in 2025, down 2.5% since 2020, against +3.1% for the U.S. It has 264,419 households. The median household income in San Mateo County is $158,855 a year, 97% above the U.S. median of $80,734. That rose 29.5% from the 2015–2019 survey, 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. San Mateo County scores 78 for urgent care and walk-in clinics (high), #11 of 325 scored counties.
How can I see the market around a specific site?
Run a Groundwork site report on an address in San Mateo County. It maps the urgent care and walk-in clinics 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 urgent care and walk-in clinics · All 56 business types in San Mateo County
Screening a site or an acquisition in San Mateo 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 San Mateo 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.