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, 2016)


Total Population 36,858
Population in Households 36,498
Population in Familes 30,229
Population in Group Qrtrs 360
Population Density1 1,759
Diversity Index2 83


Total Households 12,805
Average Household Size 2.85
Family Households 9,154
Average Family Size 3


Total Housing Units 13,483 (100%)
Owner Occupied HU 9,443 (70.0%)
Renter Occupied HU 3,362 (24.9%)
Vacant Housing Units 678 ( 5.0%)
Median Home Value $642,705
Average Home Value $688,907


Median Household Income $88,789
Average Household Income $122,704
Per Capita Income $43,050
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population 0.31% 0.5%
Households 0.18% 0.41%
Families 0.23% 0.45%
Median Household Income   2.52%
Per Capita Income   1.72%
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.

Altadena, CA 91001 - Peer Comparisons by Rank and Percentile

The table below compares 91001 to the other 1,756 ZIP Codes 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 # 441 75th
Population Density1 # 734 58th
Diversity Index2 # 359 80th
Median Household Income # 285 84th
Per Capita Income # 359 80th

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