Millbrae, California Demographics & Population 2026
During the 2020–2024 ACS period, Millbrae, California had a total population of 22,689, the 321st largest city in California, with a median household income of $163,476, which is 65% higher than the state average. The poverty rate is 6.0%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Household income is 65% above the state average — one of the wealthiest communities in California.
- Housing affordability is a challenge — homes cost 11.8x the median household income.
Millbrae Quick Facts
How Millbrae Changed
Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.
| Metric | 2019–2023 | 2020–2024 | Change |
|---|---|---|---|
| Population | 22,589 | 22,689 | +0.4% |
| Median household income | $157,567 | $163,476 | +3.8% |
| Median home value | $1,929,700 | $1,934,900 | +0.3% |
How Millbrae Compares
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
A diverse community with significant representation from multiple racial and ethnic groups.
State average: 70 | National average: 61
Education
Educational Attainment (Adults 25+)
Millbrae Rankings in California
Explore California Rankings
Other Cities in San Mateo County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| San Mateo | 103,105 | $153,504 | 8.2% | $1,618,700 |
| Daly City | 101,964 | $123,547 | 7.7% | $1,115,000 |
| Redwood City | 82,447 | $157,814 | 6.3% | $1,801,700 |
| South San Francisco | 64,305 | $136,578 | 6.7% | $1,188,800 |
| San Bruno | 42,307 | $141,272 | 6.0% | $1,207,500 |
| Pacifica | 37,261 | $160,523 | 5.8% | $1,249,800 |
| Foster City | 32,792 | $199,143 | 4.1% | $1,838,200 |
| Menlo Park | 32,727 | $210,025 | 5.8% | $2,000,000+ |
| Burlingame | 30,525 | $174,000 | 7.1% | $2,000,000+ |
| San Carlos | 29,614 | $237,470 | 3.3% | $2,000,000+ |
Cities Similar to Millbrae
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Calabasas | 22,669 | $165,288 | $1,504,500 | 73.3% | 8.8% |
| Laguna Beach | 22,710 | $143,843 | $2,000,000+ | 69.3% | 6.1% |
| Stevenson Ranch | 20,990 | $158,434 | $1,085,500 | 59.1% | 4.2% |
| Granite Bay | 21,673 | $184,606 | $1,135,900 | 63.7% | 5.1% |
| Ladera Ranch | 23,793 | $184,458 | $1,151,000 | 68.0% | 4.2% |
Population Overview
Millbrae is a small city located in California, within San Mateo County. The total population is 22,689. It ranks as the 321st most populous out of 1,570 Census-designated places in California.
Age Demographics
The median age in Millbrae is 43.7 years. This is 15% higher than the state median of 37.9 years. 10.0% of residents are 75 or older, suggesting a significant retirement-age population with implications for healthcare services and senior housing.
Economy, Income & Housing
The median household income in Millbrae is $163,476. This is 65% higher than the state median of $99,122. It is also 102% higher than the national median of $80,734. The poverty rate stands at 6.0%. This is 50% lower than the state poverty rate of 12.0%. The unemployment rate is 5.7%. This is 14% lower than the state rate of 6.6%. The median home value is $1,934,900. Housing costs are 163% higher than the state median of $734,700. The home-value-to-income ratio of 11.8x suggests that housing affordability is a significant concern for many residents. 60.8% of occupied housing units are owner-occupied. This homeownership rate is 9% higher than the state average of 55.9%.
Race & Ethnicity
The largest racial or ethnic group in Millbrae is Asian, making up 48.1% of the population. White (non-Hispanic) residents account for 29.4%. The Black or African American population (0.9%) is well below the state average of 5.2%. The Hispanic or Latino population (13.9%) is well below the state average of 40.2%. The Asian population is significantly higher than the state average (48.1% vs 15.3%).
Education
52.7% of residents aged 25 and older hold a bachelor's degree or higher. This is 42% higher than the state rate of 37.1%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 93.6%. Notably, 21.6% of adults hold a graduate or professional degree, indicating a highly educated workforce.
Data Sources & Methodology
All demographic data for Millbrae, California is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against California state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 1,570 Census-designated places in California. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.
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Frequently Asked Questions
What is the population of Millbrae, California?
Millbrae, California has a population of 22,689 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Millbrae, CA?
The median household income in Millbrae is $163,476, which is 102% higher than the national median of $80,734.
What is the poverty rate in Millbrae, CA?
The poverty rate in Millbrae is 6.0%. This means approximately 1,340 residents live below the federal poverty line.
What is the racial makeup of Millbrae, California?
Millbrae's population is 29.4% White, 0.9% Black, 13.9% Hispanic/Latino, and 48.1% Asian.
What is the median home value in Millbrae, CA?
The median home value in Millbrae is $1,934,900. The home-value-to-income ratio is 11.8x.
How educated is Millbrae, California?
52.7% of adults (25+) in Millbrae hold a bachelor's degree or higher, and 21.6% hold a graduate or professional degree.