Millbrae, CA Profile: Facts, Map & Data


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Millbrae, California - Basic Facts

The City of Millbrae had a population of 22,816 as of July 1, 2018. Millbrae ranks in the upper quartile for Population Density when compared to the other cities, towns and Census Designated Places (CDPs) in California. See peer rankings below.

The primary coordinate point for Millbrae is located at latitude 37.599 and longitude -122.402 in San Mateo County. The formal boundaries for the City of Millbrae (see map below) encompass a land area of 3.25 sq. miles and a water area of 0.01 sq. miles. San Mateo County is in the Pacific time zone (GMT -8). The elevation is 33 feet.

The City of Millbrae (GNIS ID: 2411110) has a C1 Census Class Code which indicates an active incorporated place that does not serve as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

California is one of 20 states where Census County Divisions (CCDs) are used for statistical tracking of subdivisions within each county. The City of Millbrae is located within South San Francisco CCD of San Mateo County.

Beneath the boundary map are tables with Millbrae population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2018.

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City of Millbrae, CA Boundary Map

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Millbrae, CA Data & Demographics (As of July 1, 2018)


Total Population 22,816
Population in Households 22,507
Population in Familes 19,251
Population in Group Qrtrs 309
Population Density2 7,021
Diversity Index3 67


Median Household Income $100,454
Average Household Income $131,307
Per Capita Income $49,012


Total Housing Units 8,786 (100%)
Owner Occupied HU 5,393 (61.4%)
Renter Occupied HU 3,022 (34.4%)
Vacant Housing Units 371 ( 4.2%)
Median Home Value $1,110,889
Average Home Value $1,176,752


Total Households 8,415
Average Household Size 2.67
Family Households 6,035
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.


2010-2017 2017-2022
Population 0.7% 0.57%
Households 0.62% 0.51%
Families 0.64% 0.52%
Median Household Income   2.33%
Per Capita Income   2.97%

Millbrae, CA - Peer Comparisons by Rank and Percentile

The table below compares Millbrae to the other 1,516 incorporated cities, towns and CDPs in California by rank and percentile using July 1, 2018 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 324 79th
Population Density # 140 91st
Diversity Index # 706 53rd
Median Household Income # 219 86th
Per Capita Income # 276 82nd

Additional comparisons and rankings can be made with a VERY EASY TO USE California Census Data Comparison Tool.

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