Altadena, CA 91001 ZIP Code Profile

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Altadena, CA

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ZIP Code 91001: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Altadena, CA 91001

  • ZIP Code Type: STANDARD
  • Businesses Addresses: 447
  • Single Family Addresses: 12,247
  • Multi-Family Addresses: 641
  • County: Los Angeles County
  • Centroid: Latitude 34.188, Longitude -118.14
  • 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.


91001 ZIP Code Map

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Altadena, CA 91001 Data & Demographics (As of July 1, 2017)


Total Population 37,341
Daytime Population: Workers 6,026
Daytime Population: Residents 19,203
Total Daytime Population (TDP) 25,229
Ratio TDP/Total Population1 0.68
Population in Households 36,976
Population in Familes 30,614
Population in Group Qrtrs 365
Population Density2 3,769
Diversity Index3 83


Median Household Income $92,020
Average Household Income $129,531
Per Capita Income $45,467


Total Housing Units 13,617 (100%)
Owner Occupied HU 9,603 (70.5%)
Renter Occupied HU 3,383 (24.8%)
Vacant Housing Units 631 ( 4.6%)
Median Home Value $669,654
Average Home Value $727,452


Total Households 12,986
Average Household Size 2.85
Family Households 9,284
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 0.39% 0.46%
Households 0.29% 0.4%
Families 0.32% 0.42%
Median Household Income   1.8%
Per Capita Income   2.18%

Altadena, CA 91001 - Peer Comparisons by Rank and Percentile

The table below compares 91001 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 # 451 74th
Population Density # 538 70th
Diversity Index # 366 79th
Median Household Income # 300 83rd
Per Capita Income # 368 79th

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

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