Millbrae, CA Profile: Facts & Data

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Millbrae, California - Basic Facts

The City of Millbrae had a population of 23,432 as of July 1, 2023. 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 37.5985 and longitude -122.3872 in San Mateo County. The formal boundaries for the City of Millbrae 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 City of Millbrae 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.


Jump to... (On This Page!)
  1. Millbrae 2023 Demographic Data
  2. Growth Rates for Millbrae (Historical & 5-Year Forecast)
  3. Peer Comparisons (Rank and Percentile)
  1. Neighborhoods Demographics (Home Values, Household Income, etc.)
  2. California Research Tools (Easy Tools & Current Data)
  3. California Data Comparison Tool - 2023 Demographics
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Millbrae, CA Data & Demographics (As of July 1, 2023)

POPULATION

Total Population 23,432 (100%)
Population in Households 23,230 (99.1%)
Population in Families 19,745 (84.3%)
Population in Group Quarters1 202 ( 0.9%)
Population Density 7,169
Diversity Index2 69
 
 

INCOME

Median Household Income $143,459
Average Household Income $189,942
% of Income for Mortgage4 75%
Per Capita Income $67,352
Wealth Index5 214
Socioeconomic Status Index6 Moderate (54.0)
 

HOUSING

Total HU (Housing Units) 8,719 (100%)
Owner Occupied HU 5,255 (60.3%)
Renter Occupied HU 3,052 (35.0%)
Vacant Housing Units 412 ( 4.7%)
Median Home Value $1,785,056
Average Home Value $1,725,980
Housing Affordability Index3 34
 

HOUSEHOLDS

Total Households 8,307
Average Household Size 2.80
Family Households 5,909
Average Family Size 3.00
NOTES
  1. Group Quarters - a place where people live or stay in a group living arrangement. Includes college residents halls, nursing facilities, military barracks, and correctional facilities.
  2. 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 races 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.
  3. The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
  4. The % of Income for Mortgage quantifies the percentage of median household income dedicated to mortgage payments on a home priced at the median value (assuming a 30-year mortgage and a 20% down payment).
  5. The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.
  6. The Socioeconomic Index ranges from zero (lowest relative status) to 100 (highest relative status). This measure quantifies disparities in social position of an area's inhabitants and is built from a broad range of demographic, housing, and socioeconomic inputs. More information on this measure can be found in Esri's SEI tutorial.

GROWTH RATE / YEAR

2020-2023 2023-2028
Population 0.29% 0.71%
Households 0.13% 0.55%
Families   0.47%
Median Household Income   2.45%
Per Capita Income   2.22%
Owner Occupied HU   0.15%

Millbrae, CA - Peer Comparisons by Rank and Percentile

The table below compares Millbrae to the other 1,611 incorporated cities, towns and CDPs in California by rank and percentile using July 1, 2023 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 # 319 80th
Population Density # 140 91st
Median Household Income # 146 91st
Housing Affordability Index # 290 18th
Per Capita Income # 220 86th
Diversity Index # 819 49th

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

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