San Dimas, CA Profile: Facts & Data


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San Dimas, California - Basic Facts

The City of San Dimas had a population of 34,565 as of July 1, 2020.

The primary coordinate point for San Dimas is located at latitude 34.1067 and longitude -117.8067 in Los Angeles County. The formal boundaries for the City of San Dimas 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.

Alternate Unofficial Names for San Dimas: Mud Springs.


San Dimas, CA Data & Demographics (As of July 1, 2020)


Total Population 34,565 (100%)
Population in Households 34,001 (98.4%)
Population in Families 28,776 (83.3%)
Population in Group Quarters1 564 ( 1.6%)
Population Density 2,299
Diversity Index2 73


Median Household Income $94,028
Average Household Income $119,710
% of Income for Mortgage4 28%
Per Capita Income $42,562
Wealth Index5 162


Total HU (Housing Units) 12,903 (100%)
Owner Occupied HU 8,684 (67.3%)
Renter Occupied HU 3,715 (28.8%)
Vacant Housing Units 504 ( 3.9%)
Median Home Value $632,427
Average Home Value $673,860
Housing Affordability Index3 88


Total Households 12,399
Average Household Size 2.74
Family Households 9,042
Average Family Size 3
  1. Group Quarters - a place where people live or stay in a group living arrangement. Includes college residents halls, nursing facilities, military barracks, and correctional facilities.
  2. 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 races 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.
  3. The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
  4. The % of Income for Mortgage quantifies the percentage of median household income dedicated to mortgage payments on a home priced at the median value (assuming a 30-year mortgage and a 20% down payment).
  5. The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.


2010-2020 2020-2025
Population 0.34% 0.17%
Households 0.3% 0.08%
Families 0.4% 0.14%
Median Household Income   1.82%
Per Capita Income   2.24%
Owner Occupied HU   0.11%


San Dimas, CA - Peer Comparisons by Rank and Percentile

The table below compares San Dimas to the other 1,521 incorporated cities, towns and CDPs in California by rank and percentile using July 1, 2020 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 # 244 84th
Population Density # 562 63rd
Median Household Income # 330 78th
Housing Affordability Index # 671 44th
Per Capita Income # 421 72nd
Diversity Index # 577 62nd

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

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