ZIP code
91001
Altadena, CA
91001 covers Altadena in Los Angeles County, with 36,402 people in the ACS 2023 estimate.
Figures are for the Census ZIP Code Tabulation Area (ZCTA), which is not the same as a USPS ZIP code. A PO Box or unique ZIP may have no ZCTA and no demographics. Methodology
U.S. Census Bureau, ACS 2019–2023 5-year (vintage 2023). Geography: ZCTA 91001. Methodology
ZIP code map of 91001
About ZIP code 91001
More enterprise fields
Commercial ZIP directory · not ACS
Commercial ZIP directory population_count for ZCTA 91001. Not ACS. Methodology
People in 91001
Race
- White15,570
- Black or African American7,128
- American Indian or Alaska Native328
- Asian2,433
- Native Hawaiian and Pacific Islander32
- Other race5,152
- Two or more races5,935
Hispanic or Latino (any race): 11,066
Age
- Under 103,505
- 10 to 194,259
- 20 to 293,584
- 30 to 394,412
- 40 to 494,864
- 50 to 595,748
- 60 to 695,192
- 70 to 793,202
- 80 and older1,812
Income and housing in 91001
Education
- High school graduate92.7%
- Bachelor's degree52.1%
- Graduate degree25.2%
Places covering 91001
Cities and places — Population overlap
Share of this ZIP/ZCTA’s population located within each place, based on ZIP Code Database place-overlap data. This is a population measure, not land-area overlap or the Census-place population.
ZIP Code Database place-overlap table, field percent_of_zip_population_in_place, keyed by place_geoid. Not ACS 2019–2023. Overlap vintage is the shipped overlap table and is separate from ACS. Methodology
Counties — Population overlap
Share of this ZIP/ZCTA’s population located within each county, based on ZIP Code Database county-overlap data. This is a population measure, not land-area overlap or the Census county population.
- Los Angeles County100.0%
ZIP Code Database county-overlap table, field percent_of_zip_population_in_county, keyed by county_geoid. Not ACS 2019–2023. Overlap vintage is the shipped overlap table and is separate from ACS. Methodology
0.0% of this ZIP is outside city limits (a real overlap row, not missing data).
Population history for 91001
Hover the chart or read the table below (Year | ACS | IRS).
| Year | ACS population | IRS population |
|---|---|---|
| 2005 | 32,598 | |
| 2006 | 31,750 | |
| 2007 | 33,646 | |
| 2008 | 32,404 | |
| 2009 | 32,943 | |
| 2010 | 33,613 | |
| 2011 | 38,113 | 33,808 |
| 2012 | 38,066 | 33,200 |
| 2013 | 37,832 | 33,370 |
| 2014 | 37,481 | 33,460 |
| 2015 | 37,163 | 33,450 |
| 2016 | 37,699 | 33,000 |
| 2017 | 37,528 | 33,100 |
| 2018 | 37,711 | 32,680 |
| 2019 | 37,818 | 32,660 |
| 2020 | 36,697 | 32,220 |
| 2021 | 36,867 | 31,190 |
| 2022 | 36,420 | 30,920 |
| 2023 | 36,402 |
ACS: U.S. Census Bureau American Community Survey 5-year estimates. IRS: Statistics of Income ZIP Code data.
ZIP codes near 91001
12 nearest ZIP centroids (any distance)
- 91104Pasadena2.2 miPop 35,595 · Income $103,052
- 91103Pasadena2.4 miPop 24,910 · Income $84,683
- 91101Pasadena3.3 miPop 20,814 · Income $94,180
- 91107Pasadena3.8 miPop 32,944 · Income $124,880
- 91106Pasadena3.8 miPop 23,217 · Income $89,213
- 91011La Canada Flintridge4.0 miPop 20,094 · Income $221,451
- 91125Pasadena4.0 miPop 968 · Income —
- 91105Pasadena4.1 miPop 12,546 · Income $156,835
- 91206Glendale4.9 miPop 32,330 · Income $86,684
- 91108San Marino5.2 miPop 12,464 · Income $186,023
- 91020Montrose5.4 miPop 7,265 · Income $60,899
- 91024Sierra Madre5.4 miPop 11,020 · Income $141,094
ZIP centroids within 2 miles
No other ZIP codes within 2 miles of 91001, measured by Census internal-point centroids. Try a wider radius.
ZIPs within 2 miles of this place
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ZIP code 91001 FAQ
- What city is ZIP code 91001 in?
- 91001 is in Altadena, CA.
- What county is 91001 in?
- 91001 is in Los Angeles County.
- What is the median household income in 91001?
- The median household income in 91001 is $133,840.
- Which ZIP codes are near 91001?
- Use the radius tool on this page to list ZIP codes within a chosen distance of 91001.