Altadena
Census-designated place in Los Angeles County, California
Altadena is an unincorporated community (census-designated place) in Los Angeles County, California, with 42,846 residents (2020 Census). It sits at 1,358 ft (414 m) above sea level. The nearest town is Pasadena, 2.2 miles S.
- 42,846residents (2020 Census)
- 1,358 ftelevation · 414 m
- 8.5 sq miland area · 21.9 km²
- 5,062 / sq mipopulation density
- 91001main ZIP code (3 in total)
About Altadena
Altadena (AL-tə-DEE-nə) is an unincorporated area and census-designated place in the San Gabriel Valley and the Verdugos regions of Los Angeles County, California. Directly north of Pasadena, it is located approximately 14 miles (23 km) from Downtown Los Angeles. Its population was 42,846 at the 2020 census, up slightly from a 2010 figure of 42,777. In early 2025, the community was severely impacted by the Eaton Fire.
Text: Wikipedia · CC BY-SA 4.0
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- Median household income
- $128,720
- Median home value
- $1,120,000
- Median rent
- $2,355/mo
- Median age
- 46.4
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Open in Google Maps ›Altadena, CA population
Altadena had 42,846 residents in the 2020 Census.
| 2020 Census | 42,846 |
|---|---|
| Density | 5,062 per sq mi (1,954 per km²) |
Source: U.S. Census Bureau, Decennial Census.
Altadena at a glance
| State | California (CA) |
|---|---|
| County | Los Angeles County |
| Type | Census-designated place |
| Population | 42,846 (2020) |
| Land area | 8.46 sq mi (21.9 km²) |
| Water area | 0.02 sq mi (0.04 km²) |
| Elevation | 1,358 ft (414 m) |
| Coordinates | 34.1922° N, 118.1356° W |
| ZIP codes | 91001, 91103, 91104 |
| Official website | altadenatowncouncil.org |
| Census code (GEOID) | 0601290 |
Sources: U.S. Census Bureau (Gazetteer, ZCTA), USGS GNIS, Wikidata.
Towns near Altadena
- Pasadena2.2 mi S
- La Cañada Flintridge3.9 mi W
- San Pasqual4.1 mi SE
- San Marino5.0 mi S
- East Pasadena5.1 mi SE
- Sierra Madre5.1 mi E
- South Pasadena5.9 mi S
- East San Gabriel6.1 mi SE
- Glendale6.3 mi W
- La Crescenta-Montrose6.4 mi NW
- Arcadia7.0 mi SE
- San Gabriel7.1 mi S
Straight-line distance between town centers.
Frequently asked questions about Altadena
What county is Altadena in?
Altadena is in Los Angeles County, California.
What is the population of Altadena, CA?
42,846 people lived in Altadena at the 2020 Census.
What is the ZIP code of Altadena, CA?
The main ZIP code is 91001. Other ZIP codes: 91103, 91104.
What is the elevation of Altadena?
1,358 feet (414 m) above sea level.
What towns are near Altadena?
Pasadena (2.2 mi), La Cañada Flintridge (3.9 mi), San Pasqual (4.1 mi), San Marino (5.0 mi), East Pasadena (5.1 mi).
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