Martinez, CA Profile: Facts, Map & Data


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Martinez, California - Basic Facts

The City of Martinez had a population of 37,901 as of July 1, 2017.

The primary coordinate point for Martinez is located at latitude 37.9981 and longitude -122.1144 in Contra Costa County. The formal boundaries for the City of Martinez (see map below) encompass a land area of 12.63 sq. miles and a water area of 1 sq. miles. Contra Costa County is in the Pacific time zone (GMT -8). The elevation is 23 feet.

The City of Martinez (GNIS ID: 2411045) 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 Martinez is located within Central Contra Costa CCD of Contra Costa County.

Beneath the boundary map are tables with Martinez population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2017.

Neighborhood Data

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City of Martinez, CA Boundary Map

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Martinez, CA Data & Demographics (As of July 1, 2017)


Total Population 37,901
Daytime Population: Workers 22,961
Daytime Population: Residents 18,019
Total Daytime Population (TDP) 40,980
Ratio TDP/Total Population1 1.08
Population in Households 36,514
Population in Familes 28,499
Population in Group Qrtrs 1,387
Population Density2 3,001
Diversity Index3 60


Median Household Income $85,076
Average Household Income $109,268
Per Capita Income $44,226


Total Housing Units 15,577 (100%)
Owner Occupied HU 9,799 (62.9%)
Renter Occupied HU 5,136 (33.0%)
Vacant Housing Units 642 ( 4.1%)
Median Home Value $517,072
Average Home Value $548,548


Total Households 14,935
Average Household Size 2.44
Family Households 9,575
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% 0.79%
Households 0.53% 0.71%
Families 0.48% 0.69%
Median Household Income   2.4%
Per Capita Income   2.53%

Martinez, CA - Peer Comparisons by Rank and Percentile

The table below compares Martinez to the other 1,516 incorporated cities, towns and CDPs in California by rank and percentile using July 1, 2017 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 # 226 85th
Population Density # 461 70th
Diversity Index # 828 45th
Median Household Income # 292 81st
Per Capita Income # 310 80th

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

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