San Carlos is a city in San Mateo County, California, home to about 29,614 people across 5.4 square miles. Its ZIP code is 94070.
Homes sold for a median of $1,361 per square foot in the three months ending August 2026, a seller’s market.
Each card is that ZIP code’s whole market, including any part outside San Carlos. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up San Carlos’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | San Francisco International Airport (SFO)10 miles away |
|---|---|
| Closer regional airport | San Carlos Airport (SQL)1 mile away |
| Nearest city of 250,000+ | Oakland, CA19 miles away |
| Nearest city of 1 million+ | Los Angeles, CA323 miles away |
Straight-line distances from the center of San Carlos; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
San Carlos had 30,722 residents in the 2020 census, up 11% since 2000.
It’s the 272nd largest of 1,563 towns in California by population.
San Mateo County grew from 12,094 residents in 1900 to 764,442 in 2020.
San Mateo County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 81°F in summer, and winter lows average 40°F. About 19.2 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Redwood City, CA weather station (2 miles away).
477,938 jobs at 21,569 businesses in San Mateo County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
751 doctors and other health care providers list an office in San Carlos.
Nearest hospitals
Providers with an office here
| Primary care doctors | 63 |
|---|---|
| Specialist doctors | 68 |
| Dentists | 43 |
| Nurse practitioners and physician assistants | 46 |
| Mental health providers | 422 |
| Physical and occupational therapists | 60 |
| Optometrists | 14 |
| Chiropractors | 35 |
| Pharmacies | 8 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Parks (25 nearby)
Grocery stores (7 nearby)
Pharmacies (2 nearby)
Libraries (4 nearby)
Museums (3 nearby)
Theaters and performance venues (4 nearby)
Counts are within about 1.5 miles of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Notable people born here
Source: Wikidata (wikidata.org), the free knowledge base; people are listed by place of birth.
Public schools here are run by San Carlos Elementary, San Carlos Charter Learning Center District. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Arundel ElementarySan Carlos | K–3 | 388 | Public | 0.6 mi |
| Brittan Acres ElementarySan Carlos | K–3 | 411 | Public | 0.1 mi |
| Heather ElementarySan Carlos | K–3 | 320 | Public | 0.5 mi |
| San Carlos Charter Learning CenterSan Carlos | K–8 | 377 | Charter | 1.3 mi |
| White Oaks ElementarySan Carlos | K–3 | 250 | Public | 0.8 mi |
| ArroyoSan Carlos | 4–5 | 290 | Public | 0.4 mi |
| MariposaSan Carlos | 4–5 | 322 | Public | 1.3 mi |
| Central MiddleSan Carlos | 6–8 | 443 | Public | 0.4 mi |
| Tierra Linda MiddleSan Carlos | 6–8 | 451 | Public | 1.3 mi |
| San Carlos Student Services PreschoolSan Carlos | — | — | Special Education | 1.2 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| St Charles SchoolSan Carlos | K–8 | 263 | Roman Catholic | <0.1 mi |
| Arbor Bay SchoolSan Carlos | 1–8 | 29 | Nonsectarian | 0.5 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools; Private School Universe Survey (2023-2024) for private schools. Listed by address; we don’t rate schools.
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Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.