Contra Costa County CA Information


Contra Costa County Subdivisions

Contra Costa County CA Data & Demographics (As of July 1, 2016)


Total Population 1,114,491
Population in Households 1,103,936
Population in Familes 920,021
Population in Group Qrtrs 10,555
Population Density1 1,557
Diversity Index2 79


Total Households 392,883
Average Household Size 2.81
Family Households 277,741
Average Family Size 3


Total Housing Units 415,532 (100%)
Owner Occupied HU 256,666 (61.8%)
Renter Occupied HU 136,217 (32.8%)
Vacant Housing Units 22,649 ( 5.5%)
Median Home Value $530,856
Average Home Value $589,993


Median Household Income $82,977
Average Household Income $115,160
Per Capita Income $40,989
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population 0.97% 1.12%
Households 0.73% 0.99%
Families 0.74% 0.99%
Median Household Income   2.5%
Per Capita Income   1.47%
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.


Contra Costa County CA - Peer Comparisons by Rank and Percentile

The table below compares Contra Costa 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 # 9 86th
Population Density1 # 6 91st
Diversity Index2 # 21 66th
Median Household Income # 4 95th
Per Capita Income # 5 93rd

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