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 is a community or populated place (Class Code U5) located in San Diego County at latitude 33.1224 and longitude -117.2086. San Diego County is in the Pacific time zone (GMT -8). The elevation is 525 feet.

The formal official name is the Lake San Marcos Census Designated Place, but most people and references simply refer to it as Lake San Marcos, California.

The U5 Census Class Code for Lake San Marcos indicates a populated place that is also a census designated place with the same name.. The Census Designated Place has a Functional Status Code "S" which identifies a statistical entity.

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.

Lake San Marcos Census Designated Place, CA Boundary Map


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Lake San Marcos, CA Data & Demographics (As of July 1, 2014)


Total Population 4,719
Population in Households 4,717
Population in Familes 3,598
Population in Group Qrtrs 2
Population Density1 2,743
Diversity Index2 49


Total Households 2,436
Average Household Size 1.94
Family Households 1,486
Average Family Size 2


Total Housing Units 2,530 (100%)
Owner Occupied HU 1,767 (69.8%)
Renter Occupied HU 669 (26.4%)
Vacant Housing Units 94 ( 3.7%)
Median Home Value $428,286
Average Home Value $486,962


Median Household Income $48,913
Average Household Income $77,969
Per Capita Income $34,052
  (Compound Annual Growth Rates)


2010-2014 2014-2019
Population 1.46% 2.03%
Households 1.07% 2.02%
Families 3.22% 2.07%
Median Household Income   6.0%
Per Capita Income   3.76%
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 1,523 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 # 658 57th
Population Density1 # 495 68th
Diversity Index2 # 978 36th
Median Household Income # 896 41st
Per Capita Income # 395 74th

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