San Marcos, CA Profile: Facts, Map & Data


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San Marcos, California - Basic Facts

The City of San Marcos had a population of 92,547 as of July 1, 2016. San Marcos 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 Marcos is located at latitude 33.1339 and longitude -117.1694 in San Diego County. The formal boundaries for the City of San Marcos (see map below) encompass a land area of 24.36 sq. miles and a water area of 0.02 sq. miles. San Diego County is in the Pacific time zone (GMT -8). The elevation is 581 feet.

The City of San Marcos (GNIS ID: 2411797) 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 Marcos is located within Oceanside-Escondido CCD of San Diego County.

Beneath the boundary map are tables with San Marcos 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

Address Based Hyperlocal Data Input an address and get data & demographics for the pertinent census block group (CBG), a searchable map and a customized directory. The CBG is the smallest geographical unit used by the Census Bureau for reporting certain data.


City of San Marcos, CA Boundary Map

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


Total Population 92,547
Population in Households 91,720
Population in Familes 76,353
Population in Group Qrtrs 827
Population Density1 3,798
Diversity Index2 79


Total Households 29,473
Average Household Size 3.11
Family Households 21,427
Average Family Size 4


Total Housing Units 30,865 (100%)
Owner Occupied HU 18,191 (58.9%)
Renter Occupied HU 11,282 (36.6%)
Vacant Housing Units 1,392 ( 4.5%)
Median Home Value $458,412
Average Home Value $484,900


Median Household Income $57,953
Average Household Income $82,954
Per Capita Income $27,070
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population 1.6% 1.54%
Households 1.29% 1.38%
Families 1.26% 1.41%
Median Household Income   2.06%
Per Capita Income   1.6%
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 Marcos, CA - Peer Comparisons by Rank and Percentile

The table below compares San Marcos 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 # 84 95th
Population Density1 # 336 78th
Diversity Index2 # 387 74th
Median Household Income # 669 56th
Per Capita Income # 793 48th

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

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