San Marcos, CA Profile: Facts, Map & Data


San Marcos Local Links & Resources:
Hotels | Resources | ALL San Marcos Content

Also See: San Marcos, CA ZIP Codes & ZIP Code Maps | Local Area Photos

San Marcos, California - Basic Facts

The City of San Marcos had a population of 94,345 as of July 1, 2017. 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, 2017.

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

Also See: BIG Map | Driving Directions | CA Congressional Districts
Boundary Maps: Oceanside-Escondido CCD | San Diego County | California Counties

Search the map for:

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


Total Population 94,345
Daytime Population: Workers 35,468
Daytime Population: Residents 55,572
Total Daytime Population (TDP) 91,040
Ratio TDP/Total Population1 0.96
Population in Households 93,504
Population in Familes 77,800
Population in Group Qrtrs 841
Population Density2 3,872
Diversity Index3 80


Median Household Income $59,733
Average Household Income $86,644
Per Capita Income $28,435


Total Housing Units 31,212 (100%)
Owner Occupied HU 18,718 (60.0%)
Renter Occupied HU 11,541 (37.0%)
Vacant Housing Units 953 ( 3.1%)
Median Home Value $467,803
Average Home Value $510,029


Total Households 30,259
Average Household Size 3.09
Family Households 21,976
Average Family Size 4
  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 1.65% 1.28%
Households 1.48% 1.21%
Families 1.44% 1.22%
Median Household Income   1.79%
Per Capita Income   2.67%

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, 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 # 84 95th
Population Density # 334 78th
Diversity Index # 396 74th
Median Household Income # 668 56th
Per Capita Income # 785 48th

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

California Research Tools

California Census Data Comparison Tool

Compare California Census Data
Highest or Lowest: