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2025 Compare Cities People:
Altadena, CA vs South Pasadena, CA

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Highlights
- South Pasadena is 0% more densely populated than Altadena.
- People are 8.9% more likely to be married in South Pasadena.
- The Median Age is 3.5 years younger in South Pasadena.
 Altadena, CASouth Pasadena, CAUnited States
 Population  Unlock26,837329,725,481
 Female Population53.0%  Unlock50.5%
 Male Population47.0%  Unlock49.5%
 Median Age  Unlock40.438.4
 space3
 Population - 201045,446  Unlock309,327,143
 Population - 2000  Unlock24,292285,036,114
 Population - 199042,658  Unlock251,960,433
 Pop. 2000 to Now  Unlock2.9%15.6%
 Pop. 1990 to Now4.6%  Unlock30.8%
 space4
 Population Density  Unlock7,877.093.4
 Land Area8.5  Unlock3,531,905.4
 Water Area  Unlock0.0264,836.8
 space
 Est. Total Population By Age
 Altadena, CASouth Pasadena, CAUnited States
 Age 0 to 45.4%  Unlock5.9%
 Age 5 to 9  Unlock6.9%6.1%
 Age 10 to 145.8%  Unlock6.6%
 Age 15 to 17  Unlock3.5%3.9%
 Age 18 to 202.6%  Unlock4.0%
 Age 21 to 24  Unlock3.2%5.2%
 Age 25 to 3411.8%  Unlock13.8%
 Age 35 to 44  Unlock17.4%12.9%
 Age 45 to 5414.7%  Unlock12.6%
 Age 55 to 59  Unlock6.5%6.7%
 Age 60 to 646.8%  Unlock6.3%
 Age 65 to 74  Unlock7.6%9.6%
 Age 75 to 846.1%  Unlock4.5%
 Age 85 and over  Unlock1.6%1.9%
 space1
 Race
 Altadena, CASouth Pasadena, CAUnited States
 White39.5%  Unlock59.4%
 Black  Unlock3.7%12.2%
 Asian5.3%  Unlock5.6%
 Native American  Unlock0.2%0.6%
 Hawaiian, Pacific Islander0.1%  Unlock0.2%
 Other  Unlock0.5%0.4%
 Two or More Races5.6%  Unlock3.2%
 Hispanic  Unlock19.6%18.4%
 space2
 Marriage & Family
 Altadena, CASouth Pasadena, CAUnited States
 Married Population49.8%  Unlock49.8%
     Currently Married  Unlock53.8%48.0%
 Married but Separated1.8%  Unlock1.8%
 Single Population  Unlock45.7%50.2%
 Never Married32.2%  Unlock33.8%
 Divorced  Unlock7.8%10.8%
 Widowed6.6%  Unlock5.6%
 space5
 Household Size  Unlock2.582.60
 Households14,789  Unlock124,010,992
 Family Households  Unlock6,87280,755,759
     Married couple, w/children28.9%  Unlock30.5%
     Married couple, no children  Unlock39.9%42.9%
 Non Family Households4,036  Unlock43,255,233
     Single householder, w/children  Unlock12.3%15.8%
     Single householder, no children14.7%  Unlock10.8%
Voting
Reviews for Altadena    1 Reviews
Les · Altadena, CA
Altadena: High and Dry in L.A.
Over 15 years ago

I live just above the 1500 foot elevation at the edge of the San Gabriel Mountains in the L.A. suburb of Altadena--just above Pasadena. We're above the low morning fog  More

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Reviews for South Pasadena    6 Reviews
esteban · South Pasadena, CA
don’t live in sp if you’re brown lol
Over 5 years ago

i grew up in south pas, i’m currently 20. this is not a good place for individual expression. the old white people will stare you down no matter what it is that you’re  More

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Skip · Ventura, CA
Great Place but Really Expensive if You Have a Fa
Over 13 years ago

I lived in South Pasadena from 2000-2009 and I really took it for granted until I moved. I relocated from the Midwest and I initially lived in Culver City for about  More

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garagehero · South Pasadena, CA
South Pasadena,CA
Over 16 years ago

Because of the historic nature of the neigborhoods in South Pas, it appears in many films, TV and commercials. Halloween was filmed here, as well as dozens of movies.  More

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Learn More About Altadena, California
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