Altadena, CA Profile: Facts, Map & Data


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Altadena, California - Basic Facts

The Altadena Census Designated Place had a population of 43,725 as of July 1, 2017. Altadena ranks in the upper quartile for Population Density and Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in California. See peer rankings below.

The primary coordinate point for Altadena is located at latitude 34.1922 and longitude -118.1356 in Los Angeles County. The formal boundaries for the Altadena Census Designated Place (see map below) encompass a land area of 8.71 sq. miles and a water area of 0.02 sq. miles. Los Angeles County is in the Pacific time zone (GMT -8). The elevation is 1,358 feet.

The Altadena Census Designated Place (GNIS ID: 2407732) has a U1 Census Class Code which indicates a census designated place with an official federally recognized name. It also has a Functional Status Code of "S" which identifies a statistical entity.

California is one of 20 states where Census County Divisions (CCDs) are used for statistical tracking of subdivisions within each county. The Altadena Census Designated Place is located within Pasadena CCD of Los Angeles County.

Beneath the boundary map are tables with Altadena population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2017.

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Altadena Census Designated Place, CA Boundary Map

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


Total Population 43,725
Daytime Population: Workers 7,096
Daytime Population: Residents 22,553
Total Daytime Population (TDP) 29,649
Ratio TDP/Total Population1 0.68
Population in Households 43,201
Population in Familes 35,722
Population in Group Qrtrs 524
Population Density2 5,018
Diversity Index3 81


Median Household Income $91,542
Average Household Income $129,091
Per Capita Income $45,993


Total Housing Units 16,232 (100%)
Owner Occupied HU 10,926 (67.3%)
Renter Occupied HU 4,510 (27.8%)
Vacant Housing Units 796 ( 4.9%)
Median Home Value $672,827
Average Home Value $732,234


Total Households 15,436
Average Household Size 2.8
Family Households 10,908
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 0.3% 0.41%
Households 0.2% 0.34%
Families 0.26% 0.36%
Median Household Income   1.9%
Per Capita Income   2.23%

Altadena, CA - Peer Comparisons by Rank and Percentile

The table below compares Altadena to the other 1,516 incorporated cities, towns and CDPs 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 # 210 86th
Population Density # 242 84th
Diversity Index # 330 78th
Median Household Income # 233 85th
Per Capita Income # 278 82nd

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

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