Millbrae, California Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates
The population of Millbrae, California is 22,589 as of the 2023 American Community Survey, making it the 324th-largest city in California. The median household income is $157,567, the median home value is $1,929,700, and the median age is 45.3.
The population has grown 8.1% since 2010 (21,572 → 23,321).
22,589
Population
6910
People / sq mi
$157,567
Median Income
$1,929,700
Median Home Value
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Millbrae covers 3.3 sq mi of land at 6910 people per square mile.
About Millbrae, CA
Housing cost is the defining feature of Millbrae: the median home is valued at $1,929,700. Millbrae is a city in California with a population of 22,589.
Income is a real outlier — the median household pulls in $157,567, putting Millbrae near the top of US cities. Only 3.4% of residents live in poverty, below the national 12.4%. Housing is expensive: the median home is worth $1,929,700, with typical rent around $3,401.
Educational attainment is on the higher side for US cities — 50.5% of adults hold a four-year degree, above the national 35.0%. A solid 19.9% of workers are based at home, above the national 14.0%, and the average commute runs about 29 minutes each way.
High housing values reframe the income picture in Millbrae — even solid earnings stretch less against home prices and rents at this level.
Millbrae city Population History (2010-2024)
The city of Millbrae city had a population of 21,572 in 2010 and 23,321 in 2024, a 8.1% growth over 14 years. The peak was 23,321 in 2024. Average annual growth rate: 0.57%.
23,321
Population (2024)
21,572
Population (2010)
23,321
Peak (2024)
0.57%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 21,572 |
| 2011 | 21,847 |
| 2012 | 22,123 |
| 2013 | 22,480 |
| 2014 | 22,669 |
| 2015 | 22,803 |
| 2016 | 22,764 |
| 2017 | 22,649 |
| 2018 | 22,530 |
| 2019 | 22,394 |
| 2020 | 23,138 |
| 2021 | 22,315 |
| 2022 | 22,151 |
| 2023 | 22,522 |
| 2024 | 23,321 |
Race & Ethnicity
| White | 34.0% |
| Black or African American | 0.5% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.0% |
| Two or More Races | 0.0% |
Economy & Income
$157,567
Median Household Income
$76,277
Per Capita Income
3.4%
Poverty Rate
4.1%
Unemployment Rate
Housing
$1,929,700
Median Home Value
$3,401
Median Rent
63.2%
Owner-Occupied
Education
93.2%
High School+
50.5%
Bachelor's+
Commute
9.1%
Drive Alone
57.9%
Public Transit
19.9%
Work From Home
28.8 min
Avg Commute
Community Profile
9.7%
Foreign Born
51.2%
Non-English at Home
3.0%
Veterans
9.7%
With Disability
96.9%
Health Insurance
96.7%
Internet Access
Employment by Industry
| Professional, Scientific & Management | 19.9% |
| Finance, Insurance & Real Estate | 18.3% |
| Education, Health Care & Social Services | 9.3% |
| Information | 8.7% |
| Retail Trade | 8.2% |
| Manufacturing | 6.7% |
| Construction | 5.8% |
| Arts, Entertainment & Food Services | 5.4% |
| Public Administration | 4.5% |
| Transportation & Warehousing | 3.9% |
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City rankings
Frequently Asked Questions
Millbrae, California has a population of 22,589 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 324th-largest city in California.
The median household income in Millbrae, California is $157,567, with 3.4% of residents living below the federal poverty level.
The median home value in Millbrae, California is $1,929,700, with median monthly rent at $3,401 and a homeownership rate of 63.2%.
The median age in Millbrae, California is 45.3 years. The population is 48.8% male and 51.2% female.
The population has grown 8.1% since 2010 (21,572 → 23,321).
Millbrae city, CA Climate
Millbrae city, CA has an average annual temperature of 14.1°C (57°F) and receives about 582 mm of precipitation per year. The warmest month is September and the coldest is January. Figures are 1970–2000 climate normals.
14.1°C
Avg Temp
582
Precip (mm/yr)
Sep
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | 10° / 50° | 124 mm |
| February | 12° / 53° | 107 mm |
| March | 12° / 54° | 91 mm |
| April | 13° / 56° | 34 mm |
| May | 15° / 58° | 11 mm |
| June | 16° / 61° | 4 mm |
| July | 17° / 63° | 1 mm |
| August | 17° / 63° | 2 mm |
| September | 18° / 64° | 7 mm |
| October | 16° / 61° | 33 mm |
| November | 13° / 55° | 80 mm |
| December | 10° / 50° | 88 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Millbrae city, CA
The most comfortable months to visit Millbrae city, CA are typically September, August and July, when temperatures are mildest and rainfall is relatively low. The hottest month is September (around 23°C high). The coldest is January (near 6°C low). January is usually the wettest month.
Where to stay near Millbrae
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.