San Dimas, CA Profile: Facts, Map & Data


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San Dimas, California - Basic Facts

The City of San Dimas had a population of 35,100 as of July 1, 2017.

The primary coordinate point for San Dimas is located at latitude 34.108 and longitude -117.8085 in Los Angeles County. The formal boundaries for the City of San Dimas (see map below) encompass a land area of 15.04 sq. miles and a water area of 0.39 sq. miles. Los Angeles County is in the Pacific time zone (GMT -8). The elevation is 955 feet.

The City of San Dimas (GNIS ID: 2411784) 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 San Dimas is located within East San Gabriel Valley CCD of Los Angeles County.

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

Alternate Unofficial Names for San Dimas: Mud Springs.

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City of San Dimas, CA Boundary Map

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


Total Population 35,100
Daytime Population: Workers 23,833
Daytime Population: Residents 18,232
Total Daytime Population (TDP) 42,065
Ratio TDP/Total Population1 1.20
Population in Households 34,536
Population in Familes 29,192
Population in Group Qrtrs 564
Population Density2 2,334
Diversity Index3 73


Median Household Income $85,043
Average Household Income $113,427
Per Capita Income $40,909


Total Housing Units 13,003 (100%)
Owner Occupied HU 8,929 (68.7%)
Renter Occupied HU 3,629 (27.9%)
Vacant Housing Units 445 ( 3.4%)
Median Home Value $491,228
Average Home Value $542,320


Total Households 12,558
Average Household Size 2.75
Family Households 9,152
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% 0.69%
Households 0.59% 0.63%
Families 0.73% 0.65%
Median Household Income   1.88%
Per Capita Income   2.13%

San Dimas, CA - Peer Comparisons by Rank and Percentile

The table below compares San Dimas 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 # 239 84th
Population Density # 560 63rd
Diversity Index # 574 62nd
Median Household Income # 293 81st
Per Capita Income # 351 77th

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

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