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2025 Compare Cities People:
Altadena, CA vs Walnut Creek, CA

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Highlights
- Walnut Creek is 0% more densely populated than Altadena.
- People are 11.3% more likely to be married in Walnut Creek.
- The Median Age is 3.9 years older in Walnut Creek.
 Altadena, CAWalnut Creek, CAUnited States
 Population  Unlock69,876329,725,481
 Female Population53.0%  Unlock50.5%
 Male Population47.0%  Unlock49.5%
 Median Age  Unlock47.838.4
 space3
 Population - 201045,446  Unlock309,327,143
 Population - 2000  Unlock64,296285,036,114
 Population - 199042,658  Unlock251,960,433
 Pop. 2000 to Now  Unlock8.8%15.6%
 Pop. 1990 to Now4.6%  Unlock30.8%
 space4
 Population Density  Unlock3,537.093.4
 Land Area8.5  Unlock3,531,905.4
 Water Area  Unlock0.0264,836.8
 space
 Est. Total Population By Age
 Altadena, CAWalnut Creek, CAUnited States
 Age 0 to 45.4%  Unlock5.9%
 Age 5 to 9  Unlock4.5%6.1%
 Age 10 to 145.8%  Unlock6.6%
 Age 15 to 17  Unlock2.9%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  Unlock12.2%12.9%
 Age 45 to 5414.7%  Unlock12.6%
 Age 55 to 59  Unlock6.8%6.7%
 Age 60 to 646.8%  Unlock6.3%
 Age 65 to 74  Unlock14.2%9.6%
 Age 75 to 846.1%  Unlock4.5%
 Age 85 and over  Unlock5.8%1.9%
 space1
 Race
 Altadena, CAWalnut Creek, CAUnited States
 White39.5%  Unlock59.4%
 Black  Unlock2.3%12.2%
 Asian5.3%  Unlock5.6%
 Native American  Unlock0.1%0.6%
 Hawaiian, Pacific Islander0.1%  Unlock0.2%
 Other  Unlock0.1%0.4%
 Two or More Races5.6%  Unlock3.2%
 Hispanic  Unlock10.1%18.4%
 space2
 Marriage & Family
 Altadena, CAWalnut Creek, CAUnited States
 Married Population49.8%  Unlock49.8%
     Currently Married  Unlock54.2%48.0%
 Married but Separated1.8%  Unlock1.8%
 Single Population  Unlock44.5%50.2%
 Never Married32.2%  Unlock33.8%
 Divorced  Unlock10.5%10.8%
 Widowed6.6%  Unlock5.6%
 space5
 Household Size  Unlock2.152.60
 Households14,789  Unlock124,010,992
 Family Households  Unlock18,38880,755,759
     Married couple, w/children28.9%  Unlock30.5%
     Married couple, no children  Unlock55.3%42.9%
 Non Family Households4,036  Unlock43,255,233
     Single householder, w/children  Unlock7.8%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 Walnut Creek    16 Reviews
Todd · Walnut Creek, CA
Best place to live in the San Francisco Bay Area
Over 6 years ago

Apart from the congestion, Walnut Creek is one of the best places in the San Francisco Bay Area to live. It is one of the most compact/walkable cities in the entire area  More

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Ken · Walnut Creek, CA
Great water quality
Over 7 years ago

Almost all of Walnut Creek water comes from Pardee dam through an enclosed pipeline. That water is direct from the high Sierras. Among the best water quality in the  More

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Rachel · Walnut Creek, CA
So hot
Over 7 years ago

I grew up in Southern California and am no stranger to a more inland California climate. Before moving to WC I lived in San Francisco for 15 years where it is obviously  More

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Learn More About Altadena, California
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