San Mateo County CA Information


San Mateo County Subdivisions

San Mateo County CA Data & Demographics (As of July 1, 2016)


Total Population 753,390
Population in Households 744,537
Population in Familes 603,539
Population in Group Qrtrs 8,853
Population Density1 1,680
Diversity Index2 80


Total Households 266,792
Average Household Size 2.79
Family Households 181,767
Average Family Size 3


Total Housing Units 281,126 (100%)
Owner Occupied HU 154,125 (54.8%)
Renter Occupied HU 112,667 (40.1%)
Vacant Housing Units 14,334 ( 5.1%)
Median Home Value $806,497
Average Home Value $837,647


Median Household Income $92,243
Average Household Income $131,019
Per Capita Income $46,877
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population 0.76% 1.0%
Households 0.55% 0.86%
Families 0.55% 0.87%
Median Household Income   2.4%
Per Capita Income   1.56%
1) Population Density = Total Population per square mile.
2) The Diversity Index is a scale of 0 to 100 that represents the likelyhood 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.
Based on Census 2010 counts, the Diversity Index for the United States was 60.6 and it is expected to increase to 64.8 by July 1, 2018.


San Mateo County CA - Peer Comparisons by Rank and Percentile

The table below compares San Mateo County to the other 58 counties and county equivalents in California by rank and percentile using July 1, 2016 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 # 14 78th
Population Density1 # 5 93rd
Diversity Index2 # 19 69th
Median Household Income # 3 97th
Per Capita Income # 3 97th

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