Lake San Marcos, CA Profile: Facts, Map & Data


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Lake San Marcos, California - Basic Facts

The Lake San Marcos Census Designated Place had a population of 4,781 as of July 1, 2016.

The primary coordinate point for Lake San Marcos is located at latitude 33.1224 and longitude -117.2086 in San Diego County. The formal boundaries for the Lake San Marcos Census Designated Place (see map below) encompass a land area of 1.72 sq. miles and a water area of 0.09 sq. miles. San Diego County is in the Pacific time zone (GMT -8). The elevation is 525 feet.

The Lake San Marcos Census Designated Place (GNIS ID: 2408550) has a U1 Census Class Code which indicates a census designated place with an official federally recognized name. It also has a Functional Status Code of "S" which identifies a statistical entity.

California is one of 20 states where Census County Divisions (CCDs) are used for statistical tracking of subdivisions within each county. The Lake San Marcos Census Designated Place is located within Oceanside-Escondido CCD of San Diego County.

Beneath the boundary map are tables with Lake 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

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Lake San Marcos Census Designated Place, CA Boundary Map

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Boundary Maps: Oceanside-Escondido CCD | San Diego County | California Counties

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


Total Population 4,781
Population in Households 4,779
Population in Familes 3,648
Population in Group Qrtrs 2
Population Density1 2,779
Diversity Index2 51


Total Households 2,427
Average Household Size 1.97
Family Households 1,489
Average Family Size 2


Total Housing Units 2,621 (100%)
Owner Occupied HU 1,763 (67.3%)
Renter Occupied HU 664 (25.3%)
Vacant Housing Units 194 ( 7.4%)
Median Home Value $491,395
Average Home Value $507,222


Median Household Income $49,227
Average Household Income $73,896
Per Capita Income $32,048
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population 1.2% 2.17%
Households 0.67% 2.06%
Families 2.21% 2.12%
Median Household Income   0.53%
Per Capita Income   1.33%
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.

Lake San Marcos, CA - Peer Comparisons by Rank and Percentile

The table below compares Lake 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 # 655 57th
Population Density1 # 492 68th
Diversity Index2 # 969 36th
Median Household Income # 941 38th
Per Capita Income # 550 64th

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

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