Altadena CDP, California Demographics & Population 2026

Population Overview

Altadena CDP is a mid-sized community located in California. The total population is 41,921. It ranks as the 217th most populous out of 1,577 cities and towns in California.

Age Demographics

The median age in Altadena CDP is 46.2 years. This is 23% higher than the state median of 37.6 years. 10.2% of residents are 75 or older, suggesting a significant retirement-age population with implications for healthcare services and senior housing.

Economy, Income & Housing

The median household income in Altadena CDP is $129,123. This is 34% higher than the state median of $96,334. Compared to the national median of $78,538, household income here is 64% higher. The poverty rate stands at 7.4%. This is 38% lower than the state poverty rate of 12.0%. The unemployment rate is 7.3%. This is 14% higher than the state rate of 6.4%. The median home value is $1,073,500. Housing costs are 54% higher than the state median of $695,400. The home-value-to-income ratio of 8.3x suggests that housing affordability is a significant concern for many residents. 78.3% of occupied housing units are owner-occupied. This homeownership rate is 40% higher than the state average of 55.8%.

Race & Ethnicity

Altadena CDP is a highly diverse community where no single racial or ethnic group constitutes a majority of the population. Hispanic or Latino residents account for 27.2%. The Black or African American population is significantly higher than the state average (17.6% vs 5.3%). The Asian population (5.3%) is well below the state average of 15.0%.

Education

52.6% of residents aged 25 and older hold a bachelor's degree or higher. This is 44% higher than the state rate of 36.5%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 92.8%. Notably, 25.7% of adults hold a graduate or professional degree, indicating a highly educated workforce.

Data Sources & Methodology

All demographic data for Altadena CDP, California is sourced from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates (2019-2023). The ACS collects data from approximately 3.5 million households annually, providing reliable estimates for communities of all sizes. Comparisons are made against California state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 1,577 Census-designated places in California. For official data, visit data.census.gov.