Altadena Population

2011–2026

41,723

2026 projection

3.1% since 2020 (decrease)

010K20K30K40K50K20122014201620182020202220242026

Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.

Use the left and right arrow keys to inspect population observations.

Population by year

Population estimates for Altadena. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
202641,723-660.16%
202541,789-1320.16%
202341,921-7981.87%
202242,719-6651.53%
202143,384+3470.81%
202043,037-1,8134.04%
201944,850-2960.66%
201845,146-900.20%
201745,236+2350.52%
201645,001+3800.85%

Showing 10 of 15 years.

Altadena Demographics

46.4median age

Median age

Female48.6 yrs
Male43.6 yrs

Adults

33,731
9,186 seniors · 27%24,545 other adults

Sex

Female 52.7% · 21,960Male 47.3% · 19,745

Population by age

MaleFemale85+ years, male: 60685+ years, female: 68580–84 years, male: 53080–84 years, female: 80875–79 years, male: 57275–79 years, female: 1,16970–74 years, male: 82970–74 years, female: 95865–69 years, male: 1,22465–69 years, female: 1,80560–64 years, male: 1,29960–64 years, female: 1,59155–59 years, male: 1,80755–59 years, female: 1,95250–54 years, male: 1,21750–54 years, female: 1,76745–49 years, male: 1,51845–49 years, female: 1,28940–44 years, male: 1,24540–44 years, female: 1,31335–39 years, male: 1,34135–39 years, female: 1,35330–34 years, male: 1,18830–34 years, female: 1,41825–29 years, male: 78825–29 years, female: 1,11620–24 years, male: 1,13520–24 years, female: 57315–19 years, male: 1,15815–19 years, female: 79010–14 years, male: 1,25910–14 years, female: 1,2765–9 years, male: 1,0585–9 years, female: 1,0200–4 years, male: 9710–4 years, female: 1,07785+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–45005001K1K1.5K1.5K

Hover or tap an age group to see exact counts. Use the up and down arrow keys to inspect age groups.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101

Race and ethnicity

Tap a square or a group below to highlight it.

Each square is about 1% of residents (roughly 417 people).

Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002

Altadena Income

$128,720median household income

Median household income

$128,720

Half of households earn more, half earn less

Median earnings

$68,043

Typical yearly pay for a worker 25 or older.

Poverty rate

7.9%

About 1 in 13 residents

U.S. Census Bureau, 2024 ACS 5-year estimates · Tables S1901, S1501, S1701

Altadena Marital Status

48% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married48%53%44%
Never married34%38%30%
Divorced11%5%15%
Widowed6%2%9%
Separated2%2%2%

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201

Sources

10 sources, all from the U.S. Census Bureau

Population

American Community Survey, 2024 5-year