Union City, CA Profile: Facts, Map & Data


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Union City, California - Basic Facts

The City of Union City had a population of 72,631 as of July 1, 2016. Union City 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 Union City is located at latitude 37.603 and longitude -122.0187 in Alameda County. The formal boundaries for the City of Union City (see map below) encompass a land area of 19.4 sq. miles and a water area of 0 sq. miles. Alameda County is in the Pacific time zone (GMT -8). The elevation is 66 feet.

The City of Union City (GNIS ID: 2412130) 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 Union City is located within Fremont CCD of Alameda County.

Beneath the boundary map are tables with Union City population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2016.

Alternate Unofficial Names for Union City: Decoto.

Neighborhood Data

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City of Union City, CA Boundary Map

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Union City, CA Data & Demographics (As of July 1, 2016)


Total Population 72,631
Population in Households 72,106
Population in Familes 64,250
Population in Group Qrtrs 525
Population Density1 3,744
Diversity Index2 77


Total Households 21,238
Average Household Size 3.4
Family Households 17,319
Average Family Size 4


Total Housing Units 22,035 (100%)
Owner Occupied HU 13,749 (62.4%)
Renter Occupied HU 7,490 (34.0%)
Vacant Housing Units 797 ( 3.6%)
Median Home Value $564,486
Average Home Value $563,826


Median Household Income $86,218
Average Household Income $107,295
Per Capita Income $31,685
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population 0.7% 1.04%
Households 0.62% 0.97%
Families 0.61% 0.97%
Median Household Income   2.46%
Per Capita Income   1.46%
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.

Union City, CA - Peer Comparisons by Rank and Percentile

The table below compares Union City to the other 1,516 incorporated cities, towns and CDPs 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 # 119 92nd
Population Density1 # 343 77th
Diversity Index2 # 445 71st
Median Household Income # 242 84th
Per Capita Income # 567 63rd

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

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