San Anselmo, CA Profile: Facts, Map & Data


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San Anselmo, California - Basic Facts

The Town of San Anselmo had a population of 12,749 as of July 1, 2016. San Anselmo ranks in the upper quartile for Population Density and the lower quartile for Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in California. See peer rankings below.

The primary coordinate point for San Anselmo is located at latitude 37.9821 and longitude -122.5699 in Marin County. The formal boundaries for the Town of San Anselmo (see map below) encompass a land area of 2.68 sq. miles and a water area of 0 sq. miles. Marin County is in the Pacific time zone (GMT -8). The elevation is 46 feet.

The Town of San Anselmo (GNIS ID: 2413251) 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 Town of San Anselmo is located within Ross Valley CCD of Marin County.

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

Neighborhood Data

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Town of San Anselmo, CA Boundary Map

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San Anselmo, CA Data & Demographics (As of July 1, 2016)


Total Population 12,749
Population in Households 12,702
Population in Familes 9,851
Population in Group Qrtrs 47
Population Density1 4,762
Diversity Index2 30


Total Households 5,347
Average Household Size 2.38
Family Households 3,329
Average Family Size 3


Total Housing Units 5,593 (100%)
Owner Occupied HU 3,477 (62.2%)
Renter Occupied HU 1,870 (33.4%)
Vacant Housing Units 246 ( 4.4%)
Median Home Value $905,547
Average Home Value $927,487


Median Household Income $105,368
Average Household Income $141,048
Per Capita Income $59,058
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population 0.53% 0.68%
Households 0.31% 0.58%
Families 0.38% 0.59%
Median Household Income   1.89%
Per Capita Income   1.59%
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.

San Anselmo, CA - Peer Comparisons by Rank and Percentile

The table below compares San Anselmo 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 # 438 71st
Population Density1 # 258 83rd
Diversity Index2 # 1385 9th
Median Household Income # 115 92nd
Per Capita Income # 113 93rd

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

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