ZIP Code 91001 - Altadena California

ZIP Code 91001 is located in Altadena California. Portions of 91001 are also in Pasadena. 91001 is entirely within Los Angeles County. Regionally, 91001 is located in Metro Los Angeles.

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ZIP Code 91001 Quick Stats

ZIP Code NameAltadena
Primary CountyLos Angeles County
ZIP Code TypeStandard
Population (2022)36,420
Area Code(s)626
Current Time

ZIP Code 91001 Map

91001 Demographics

91001 can be classified socioeconomically as Middle Class class compared to other ZIP Codes in California based on Median Household Income and Average Adjusted Gross Income. The majority race/ethnicity residing in 91001 is White. The majority race/ethnicity attending public schools in 91001 is Hispanic. The current unemployment level in 91001 is 4.8%.

Population Growth Rate0.00%
Population Density1,128 People per Square Mile
Total Households12,863
Percentage High Income Households14.2%
Median Household Income (2021)$114,668
Average Adjusted Gross Income (2021)$465,060
Current Unemployment Rate (July 2024)4.8%
Majority Race/EthnictyWhite - 42.06%
Public School Majority Race/EthnictyHispanic - 47.64%

91001 Race/Ethnicty Breakdown

Native American3941.01%
Hawaiian/Pac. Islander360.09%

91001 Public School Race/Ethnicty Breakdown

Native American80.27%
Hawaiian/Pac. Islander40.14%

91001 Educational Attainment Levels

Highest Education Level AttainedTotalPercentage
Less Than 1 Year of College1,2955.53%
Bachelor Degree6,11526.1%
High School Diploma3,43314.65%
No High School Diploma6072.59%
GED or Alternate2601.11%
1 or More Years of College4,53919.37%
Associates Degree2,0578.78%
Masters Degree3,09713.22%
Professional Degree8983.83%
Doctorate Degree1,1324.83%

91001 Geography

Adjacent ZIP Codes
Cities/Towns in 91001
RegionMetro Los Angeles
Metropolitan/Micropolitan Stat AreaLos Angeles-Long Beach-Anaheim, CA
Time ZonePacific Daylight Time
IANA TimezoneAmerica/Los_Angeles
Area32 Square Miles

91001 Politics

US Congressional Districts in 91001
California State Senate Districts in 91001
California State Assembly Districts in 91001

91001 Weather and Climate Data

Plant Hardiness ZoneZone 10a: 30F to 35F
Average First Frost DateDecember 21 - 31
Average Last Frost DateFebruary 1 - 10
Koppen-Geiger Climate ZoneCsa - Hot-Summer Mediterranean Climate

91001 Annual Climate Data

Avg Min Temp (°F)41424347515661626053464150
Avg Max Temp (°F)59626570758289898475676073
Avg Precip (In.)5.466.295.731.

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