Martinez, CA Profile: Facts & Data


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Martinez, California - Basic Facts

The City of Martinez had a population of 38,007 as of July 1, 2018.

The primary coordinate point for Martinez is located at latitude 38.0194 and longitude -122.1341 in Contra Costa County. The formal boundaries for the City of Martinez 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.

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  1. Martinez 2018 Demographic Data
  2. Growth Rates for Martinez (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 - 2018 Demographics

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Boundary Maps, Demographic Data, School Zones Review maps and data for the neighborhood, city, county, ZIP Code, and school zone. July 1, 2018, data includes home values, household income, percentage of homes owned, rented or vacant, etc.


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


Total Population 38,007
Population in Households 36,650
Population in Familes 28,855
Population in Group Qrtrs 1,357
Population Density2 3,009
Diversity Index3 60


Median Household Income $92,075
Average Household Income $117,201
Per Capita Income $47,450


Total Housing Units 15,482 (100%)
Owner Occupied HU 9,817 (63.4%)
Renter Occupied HU 5,194 (33.5%)
Vacant Housing Units 472 ( 3.0%)
Median Home Value $558,447
Average Home Value $596,547


Total Households 15,010
Average Household Size 2.44
Family Households 9,630
Average Family Size 3
  1. Demographics are point estimates for July 1st of the current year and each for the forecast years. See References for more information.
  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.


2010-2018 2018-2023
Population 0.65% 0.79%
Households 0.53% 0.71%
Families 0.49% 0.71%
Median Household Income   2.95%
Per Capita Income   3.47%

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, 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 # 226 85th
Population Density # 461 70th
Diversity Index # 826 46th
Median Household Income # 275 82nd
Per Capita Income # 294 81st

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

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