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 is an incorporated place (Class Code P1) located in San Diego County at latitude 33.1339 and longitude -117.1694. San Diego County is in the Pacific time zone (GMT -8). The elevation is 581 feet.

The formal official name is the City of San Marcos, but most people and references simply refer to it as San Marcos, California.

The P1 Census Class Code for San Marcos indicates a populated place that is also an incorporated place with the same name and the same census code. The Incorporated Place has a Functional Status Code "A" which identifies an active government providing primary general-purpose functions.

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.

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, 2014)


Total Population 89,481
Population in Households 88,679
Population in Familes 73,846
Population in Group Qrtrs 802
Population Density1 3,672
Diversity Index2 79


Total Households 28,840
Average Household Size 3.07
Family Households 20,953
Average Family Size 4


Total Housing Units 29,778 (100%)
Owner Occupied HU 17,754 (59.6%)
Renter Occupied HU 11,086 (37.2%)
Vacant Housing Units 938 ( 3.1%)
Median Home Value $415,568
Average Home Value $461,394


Median Household Income $62,604
Average Household Income $88,749
Per Capita Income $29,112
  (Compound Annual Growth Rates)


2010-2014 2014-2019
Population 1.56% 1.5%
Households 1.39% 1.46%
Families 1.33% 1.47%
Median Household Income   4.01%
Per Capita Income   3.51%
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 1,523 incorporated cities, towns and CDPs in California by rank and percentile using July 1, 2014 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 # 349 77th
Diversity Index2 # 403 74th
Median Household Income # 488 68th
Per Capita Income # 587 62nd

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