San Marcos, CA 92078 ZIP Code Profile

Related Place Profiles:
Elfin Forest, CA | San Marcos, CA

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ZIP Code 92078: Basic Data & USPS Preferred City Name

Preferred Name, USPS
San Marcos, CA 92078

Acceptable Alternative
Elfin Forest, CA 92078

  • ZIP Code Type: STANDARD
  • Businesses Addresses: 1,368
  • Single Family Addresses: 14,974
  • Multi-Family Addresses: 2,632
  • County: San Diego County
  • Centroid: Latitude 33.114, Longitude -117.168
  • Time Zone: Pacific Time Zone (UTC -8 hours)
  • Observes DST: Yes

Neighborhood Data

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92078 ZIP Code Map

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San Marcos, CA 92078 Data & Demographics (As of July 1, 2017)


Total Population 49,383
Daytime Population: Workers 19,480
Daytime Population: Residents 29,656
Total Daytime Population (TDP) 49,136
Ratio TDP/Total Population1 0.99
Population in Households 48,625
Population in Familes 39,540
Population in Group Qrtrs 758
Population Density2 3,023
Diversity Index3 70


Median Household Income $60,796
Average Household Income $90,652
Per Capita Income $33,555


Total Housing Units 18,408 (100%)
Owner Occupied HU 12,115 (65.8%)
Renter Occupied HU 5,804 (31.5%)
Vacant Housing Units 489 ( 2.7%)
Median Home Value $508,696
Average Home Value $535,712


Total Households 17,919
Average Household Size 2.71
Family Households 12,228
Average Family Size 3
  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 1.89% 1.46%
Households 1.54% 1.36%
Families 1.63% 1.42%
Median Household Income   2.04%
Per Capita Income   2.76%

San Marcos, CA 92078 - Peer Comparisons by Rank and Percentile

The table below compares 92078 to the other 1,761 ZIP Codes 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 # 238 87th
Population Density # 618 65th
Diversity Index # 829 53rd
Median Household Income # 813 54th
Per Capita Income # 721 59th

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

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