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ZIP Code 91001
Altadena, CA, Los Angeles County
Population
35,475
Land area
8.3sq mi
People per sq mi
4,295
City
Altadena
ZIP 91001 and nearby ZIP codes
ZIP 91001 at a glance
- ZIP 91001 (Altadena) is about 17 times as dense as California as a whole.
- Households here earn a median of $134,903 a year, 36% more than the California figure of $99,122.
- A typical owner-occupied home is valued at $1,135,200 (55% above California) and median rent is $2,437 a month.
Local data for ZIP 91001
Counts from official public data
Housing and community stats
ZIP 91001, American Community Survey 2020-2024
Median household income
$134,903
Poverty rate
7.4%
Median home value
$1,135,200
Prices -4.4% in a year
Median rent
$2,437/mo
Homeownership
79.9%
Bachelor's or higher
53.9%
Median age
46.3
Average commute
28.0 min
Economy and federal money
Businesses, pandemic loans and political donations
Business establishments
752
ZIP Business Patterns 2023
Employees
4,913
$283M annual payroll
PPP loans
$60.9M
1,406 loans
Campaign donations
$518K
47% D, 7% R, 2026 cycle
Environment and hazard risk
ZIP 91001, from FEMA, NOAA and EPA
Natural hazard risk
Very High
Top: earthquake
Storm events since 1996
662
Countywide, mostly flash flood
Flood insurance policies
10,584
0.5% of homes, county
July high / Jan low
89° / 46°F
20.1 inches of rain a year
Health statistics
Share of adults in ZIP 91001, CDC PLACES estimates
Obesity
25.8%
U.S. 33.3% -7.5 pts
Diabetes
11.5%
U.S. 12.1% -0.6 pts
Smoking
8.7%
U.S. 12.8% -4.1 pts
Uninsured (18-64)
6.7%
U.S. 11.1% -4.4 pts
Frequently asked questions
- What city is ZIP code 91001?
- ZIP code 91001 is in Altadena, CA (Los Angeles County).
- What county is ZIP code 91001 in?
- ZIP code 91001 is mostly in Los Angeles County, California.
- How many people live in ZIP code 91001?
- About 35,475 people live in the 91001 ZIP Code Tabulation Area, based on American Community Survey 5-year estimates.
Source: U.S. Census Bureau (ZIP Code Tabulation Areas, American Community Survey) · Data as of 12/31/2023. ZIP Code Tabulation Areas closely match, but are not identical to, USPS ZIP code delivery areas.