Altadena, California Population 2024

42,401

Altadena is a city located in Los Angeles County California. Altadena has a 2024 population of 42,401. Altadena is currently declining at a rate of -0.37% annually and its population has decreased by -1.48% since the most recent census, which recorded a population of 43,037 in 2020.

The average household income in Altadena is $172,340 with a poverty rate of 6.81%. The median rental costs in recent years comes to - per month, and the median house value is -. The median age in Altadena is 43.8 years, 43 years for males, and 45.7 years for females.

Altadena Demographics

According to the most recent ACS, the racial composition of Altadena was:

  • White: 48.72%
  • Black or African American: 18.23%
  • Two or more races: 13.64%
  • Other race: 12.92%
  • Asian: 5.61%
  • Native American: 0.87%
  • Native Hawaiian or Pacific Islander: 0%
Land Area (mi²)
8.5 sq mi
Density (mi²)
5,009.0/sq mi
Growth Since 2020
-1.48% (-636)
The current population of Altadena, California is 42,401 based on our projections of the latest US Census estimates.The last official US Census in 2020 recorded the population at 43,037.

Altadena, California Population 2024

Population by Race

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Race
Population
Percentage (of total)
White20,81348.72%
Black or African American7,78918.23%
Two or more races5,82813.64%
Other race5,51912.92%
Asian2,3985.61%
Native American3720.87%
Native Hawaiian or Pacific Islander00%

White

Black or African American

Two or more races

Other race

Asian

Native American

Native Hawaiian or Pacific Islander

Altadena Population by Race

Altadena Population Pyramid 2024

Altadena Median Age

43.8

Total

43

Male

45.7

Female

Altadena Adults

There are 34,008 adults, (8,524 of whom are seniors) in Altadena.

Altadena Age Dependency

67.6

Age Dependency Ratio

33.4

Old Age Dependency Ratio

34.2

Child Dependency Ratio

Altadena Sex Ratio

Female22,46852.59%
Male20,25147.41%

Altadena Population by Age

Altadena Renter vs Owner Occupied by Household Type

Household Type
Count
Average Size
Owner
Renter
All14,7682.8475.724.3
Married7,5863.3582.317.7
Non Family3,8541.2869.530.5
Female2,6673.5165.234.8
Male6613.3877.922.1

3.3

Average Family Size

2.84

Average Household Size

75.7%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

Altadena Households and Families

Male

Female

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Education Attained
Count
Percentage
Less Than 9th Grade1,5364.86%
9th to 12th Grade9112.89%
High School Graduate4,46114.13%
Some College5,31116.82%
Associates Degree2,7768.79%
Bachelors Degree8,56527.12%
Graduate Degree8,01725.39%

Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

Altadena Educational Attainment by Sex (over 25)

Altadena Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

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Race
Total
High School
Bachelors
White15,09514,5409,758
Hispanic6,9615,3091,987
Black6,1015,9032,365
Other Race3,6542,552636
2+ Races2,9092,6661,678
Asian2,0972,0551,541
Native American23216410

The highest rate of high school graduation is among asian people with a rate of 98%.

The highest rate of bachelors degrees is among asian people with a rate of 73.49%.

Altadena Educational Attainment by Race

All

Male

Female

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Name
Average
Male
Female
Overall$62,505$68,974$55,550
Less Than 9th Grade$30,571$32,310$24,907
High School Graduate$34,289$36,314$31,339
Some College$42,049$52,917$34,462
Bachelors Degree$79,828$90,332$68,975
Graduate Degree$109,879$137,396$102,083

$62,505

Average Earnings

$68,974

Average Male

$55,550

Average Female

Altadena Earnings by Educational Attainment

Altadena Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

Altadena Language

67.9% of Altadena residents speak only English, while 32.1% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 19.74% of the population.

Altadena Language

Altadena Poverty by Race

rate

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Name
Total
In Poverty
Poverty Rate
Black7,52798613.1%
Hispanic11,3929778.58%
Other5,46671913.15%
White18,2047173.94%
Multiple5,8152915%
Asian2,377863.62%
Native372205.38%

6.81%

Overall Poverty Rate

5.77%

Male Poverty Rate

7.75%

Female Poverty Rate

Poverty in Altadena

The race most likely to be in poverty in Altadena is Other, with 13.15% below the poverty level.

The race least likely to be in poverty in Altadena is Asian, with 3.62% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 2.07%. Among those working part-time, it was 6.73%, and for those that did not work, the poverty rate was 12.78%.

Altadena Poverty

rate

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Rate
Poverty
Less Than 9th Grade12.63%
High School9.15%
Some College8.12%
Bachelors or Greater3.14%

Altadena Poverty Rate by Education

rate

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Rate
Poverty
Female Unemployed11.69%
Male Unemployed10.77%
Female Employed5.11%
Male Employed2.39%

Altadena Poverty Rate by Employment Status and Sex

Altadena Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

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Name
Median
Mean
Households$123,869$172,340
Families$140,072$189,482
Married Families$172,204$-999,999,999
Non Families$76,250$113,178

mean

median

Income by Household Type

Altadena Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

48.6%

Overall Marriage Rate

53.8%

Male Marriage Rate

44.0%

Female Marriage Rate

Altadena Married by Age and Sex

male

female

Altadena Marriage

The age group where males are most likely to be married is Over 65, while the female age group most likely to be married is 35-44.

Altadena Marital Status by Race

Married

Widowed

Divorced

Separated

NeverMarried

Altadena Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

1,681

Number of Veterans

1,582

Male Veterans

99

Female Veterans

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War
Veterans
Vietnam524
Korea238
First Gulf War221
Second Gulf War184
World War II113

Altadena Veterans by War

count

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Age Group
Veterans
75+763
65 to 74347
35 to 54328
55 to 64231
18 to 3412

Altadena Veterans by Age

count

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Name
Veterans
% of Total
White8745%
Black5969.16%
Hispanic1672.11%
2+ Races992.87%
Other Race811.99%
Native American208.26%
Asian110.5%

Altadena Veterans by Race

Altadena Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

3.4%

Veteran Poverty Rate

27.74%

Veteran Disability Rate

Altadena Veterans by Education

LaborForceParticipation

64.6%

Labor Force Participation

60.2%

Employment Rate

6.7%

Unemployment Rate

Altadena Employment by Age

LaborForceParticipation

Altadena Employment by Race

LaborForceParticipation

Altadena Employment by Education

Origin of Non-Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

55.07%

Born in Altadena

78.6%

Native Born

21.4%

Foreign Born

5.98%

Non Citizen

15.42%

Naturalized

Place of Birth

78.6% of Altadena residents were born in the United States, with 55.07% having been born in California. 5.98% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

Altadena Place of Birth

Note: data after 2022 is projected based on recent change

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Year
Population
Growth
Growth Rate
202442,401-159-0.37%
202342,560-159-0.37%
202242,719-665-1.53%
202143,3843470.81%
202043,037-1,813-4.04%
201944,850-296-0.66%
201845,146-90-0.2%
201745,2362350.52%
201645,0013800.85%
201544,621-10%
201444,622-393-0.87%
201345,0154370.98%
201244,578-428-0.95%
201145,0062,2295.21%
201042,77700%

Altadena Population by Year