Mount Wilson, CA 91023 ZIP Code Profile

Related Place Profiles:
Mount Wilson, CA

Camera Icon Photos of the local Mount Wilson, CA area

ZIP Code 91023: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Mount Wilson, CA 91023

  • ZIP Code Type: PO BOX
  • Businesses Addresses: 0
  • Single Family Addresses: 0
  • Multi-Family Addresses: 10
  • County: Los Angeles County
  • Centroid: Latitude 34.226, Longitude -118.092
  • Time Zone: Pacific Time Zone (UTC -8 hours)
  • Observes DST: Yes

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.


91023 ZIP Code Map

Search the map for:

Mount Wilson, CA 91023 Data & Demographics (As of July 1, 2017)


Total Population 101
Daytime Population: Workers 81
Daytime Population: Residents 65
Total Daytime Population (TDP) 146
Ratio TDP/Total Population1 1.45
Population in Households 90
Population in Familes 77
Population in Group Qrtrs 11
Population Density2 1
Diversity Index3 63


Median Household Income $102,381
Average Household Income $158,046
Per Capita Income $62,639


Total Housing Units 58 (100%)
Owner Occupied HU 31 (53.4%)
Renter Occupied HU 6 (10.3%)
Vacant Housing Units 21 (36.2%)
Median Home Value $696,429
Average Home Value $750,000


Total Households 37
Average Household Size 2.43
Family Households 28
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 1.3% 1.16%
Households 1.17% 1.06%
Families 1.58% 0.7%
Median Household Income   1.71%
Per Capita Income   1.73%

Mount Wilson, CA 91023 - Peer Comparisons by Rank and Percentile

The table below compares 91023 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 # 1670 5th
Population Density # 1710 3rd
Diversity Index # 1018 42nd
Median Household Income # 201 89th
Per Capita Income # 139 92nd

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: