Millbrae is a city in San Mateo County, California, home to about 22,689 people across 3.3 square miles. Its ZIP code is 94030.
Homes sold for a median of $1,125 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 Millbrae. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Millbrae’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)2 miles away |
|---|---|
| Nearest city of 250,000+ | Oakland, CA15 miles away |
| Nearest city of 1 million+ | Los Angeles, CA333 miles away |
Straight-line distances from the center of Millbrae; 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.
Millbrae had 23,216 residents in the 2020 census, up 12% since 2000.
It’s the 321st 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 75°F in summer, and winter lows average 45°F. About 19.6 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, San Francisco Intl Ap, 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).
80 doctors and other health care providers list an office in Millbrae.
Nearest hospitals
Providers with an office here
| Primary care doctors | 3 |
|---|---|
| Specialist doctors | 1 |
| Dentists | 34 |
| Nurse practitioners and physician assistants | 5 |
| Mental health providers | 22 |
| Physical and occupational therapists | 7 |
| Optometrists | 3 |
| Chiropractors | 5 |
| Pharmacies | 5 |
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 (16 nearby)
Grocery stores (6 nearby)
Pharmacies (2 nearby)
Libraries (2 nearby)
Museums (3 nearby)
Theaters and performance venues (1 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.
Public schools here are run by Millbrae Elementary, San Mateo Union High. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Green Hills ElementaryMillbrae | K–5 | 338 | Public | 0.4 mi |
| Meadows ElementaryMillbrae | K–5 | 360 | Public | 0.9 mi |
| Spring Valley ElementaryMillbrae | K–5 | 375 | Public | 0.9 mi |
| Taylor MiddleMillbrae | 6–8 | 756 | Public | 0.2 mi |
| Mills HighMillbrae | 9–12 | 1,115 | Public | 0.8 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| St Dunstan Catholic SchoolMillbrae | K–8 | 246 | Roman Catholic | 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.