San Marino, CA Profile: Facts & Data


San Marino Local Links & Resources:
Resources | ALL San Marino Content
Planning to visit San Marino? See Local Hotels

Also See: San Marino, CA ZIP Codes & ZIP Code Maps

San Marino, California - Basic Facts

The City of San Marino had a population of 13,127 as of July 1, 2020. San Marino 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 San Marino is located at latitude 34.1214 and longitude -118.1065 in Los Angeles County. The formal boundaries for the City of San Marino encompass a land area of 3.77 sq. miles and a water area of 0.01 sq. miles. Los Angeles County is in the Pacific time zone (GMT -8). The elevation is 564 feet.

The City of San Marino (GNIS ID: 2411799) 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 Marino is located within Pasadena CCD of Los Angeles County.


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


Total Population 13,127 (100%)
Population in Households 13,043 (99.4%)
Population in Families 12,222 (93.1%)
Population in Group Quarters1 84 ( 0.6%)
Population Density 3,486
Diversity Index2 59


Median Household Income $191,916
Average Household Income $262,077
% of Income for Mortgage4 41%
Per Capita Income $85,818
Wealth Index5 400


Total HU (Housing Units) 4,520 (100%)
Owner Occupied HU 3,876 (85.8%)
Renter Occupied HU 422 ( 9.3%)
Vacant Housing Units 222 ( 4.9%)
Median Home Value $1,858,407
Average Home Value $1,756,192
Housing Affordability Index3 61


Total Households 4,298
Average Household Size 3.03
Family Households 3,708
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 -0.01% -0.09%
Households -0.07% -0.18%
Families -0.06% -0.15%
Median Household Income   0.83%
Per Capita Income   1.32%
Owner Occupied HU   -0.12%


San Marino, CA - Peer Comparisons by Rank and Percentile

The table below compares San Marino 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 # 432 72nd
Population Density # 386 75th
Median Household Income # 30 98th
Housing Affordability Index # 292 19th
Per Capita Income # 62 96th
Diversity Index # 885 42nd

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

San Marino, CA - Most Popular Things to Do

Also See: Nearby Hotels | Driving Directions

Use HTL Address Research for a California Address and get...

Boundary Maps, Demographic Data, School Zones Review maps and data for the neighborhood, city, county, ZIP Code, and school zone. July 1, 2020, data includes home values, household income, percentage of homes owned, rented or vacant, etc.

Quick & Easy Ways to...

  1. Get Current Demographic Data for Cities, Towns, and ZIP Codes
  2. View Boundary Maps, for Cities, Towns, and ZIP Codes
  3. Locate Physical, Cultural, and Historical Features

California Census Data Comparison Tool

Compare California July 1, 2020 Data
Highest or Lowest:

More Tools and Resources:

  1. For information about schools and school attendance zones, use the HTL Address Tool
  2. Our new HTL Neighborhood Explorer provides lots of detail about any neighborhood.
  3. The new 2-Minute Introduction and Concise Guide to Big Data which will help you make the most effective use of HomeTownLocator Tools.
  4. See the References & Data Sources page for more information about methodology and sources of data.
  5. See the California COVID-19 Data and US COVID-19 Data for more information on the spread of the novel coronavirus.