2025 Compare Cities People:
Castro Valley, CA vs Walnut Creek, CA

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Highlights
- Walnut Creek is 0% more densely populated than Castro Valley.
- People are 0.6% less likely to be married in Walnut Creek.
- The Median Age is 5.4 years older in Walnut Creek.
 Castro Valley, CAWalnut Creek, CAUnited States
 Population  Unlock69,876329,725,481
 Female Population51.4%  Unlock50.5%
 Male Population48.6%  Unlock49.5%
 Median Age  Unlock47.838.4
 space3
 Population - 201060,625  Unlock309,327,143
 Population - 2000  Unlock64,296285,036,114
 Population - 199048,619  Unlock251,960,433
 Pop. 2000 to Now  Unlock8.8%15.6%
 Pop. 1990 to Now33.1%  Unlock30.8%
 space4
 Population Density  Unlock3,537.093.4
 Land Area16.6  Unlock3,531,905.4
 Water Area  Unlock0.0264,836.8
 space
 Est. Total Population By Age
 Castro Valley, CAWalnut Creek, CAUnited States
 Age 0 to 45.1%  Unlock5.9%
 Age 5 to 9  Unlock4.5%6.1%
 Age 10 to 145.5%  Unlock6.6%
 Age 15 to 17  Unlock2.9%3.9%
 Age 18 to 201.9%  Unlock4.0%
 Age 21 to 24  Unlock3.2%5.2%
 Age 25 to 3412.2%  Unlock13.8%
 Age 35 to 44  Unlock12.2%12.9%
 Age 45 to 5414.3%  Unlock12.6%
 Age 55 to 59  Unlock6.8%6.7%
 Age 60 to 647.5%  Unlock6.3%
 Age 65 to 74  Unlock14.2%9.6%
 Age 75 to 844.4%  Unlock4.5%
 Age 85 and over  Unlock5.8%1.9%
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 Race
 Castro Valley, CAWalnut Creek, CAUnited States
 White36.7%  Unlock59.4%
 Black  Unlock2.3%12.2%
 Asian31.2%  Unlock5.6%
 Native American  Unlock0.1%0.6%
 Hawaiian, Pacific Islander0.2%  Unlock0.2%
 Other  Unlock0.1%0.4%
 Two or More Races4.8%  Unlock3.2%
 Hispanic  Unlock10.1%18.4%
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 Marriage & Family
 Castro Valley, CAWalnut Creek, CAUnited States
 Married Population55.8%  Unlock49.8%
     Currently Married  Unlock54.2%48.0%
 Married but Separated1.3%  Unlock1.8%
 Single Population  Unlock44.5%50.2%
 Never Married29.8%  Unlock33.8%
 Divorced  Unlock10.5%10.8%
 Widowed6.0%  Unlock5.6%
 space5
 Household Size  Unlock2.152.60
 Households22,467  Unlock124,010,992
 Family Households  Unlock18,38880,755,759
     Married couple, w/children35.0%  Unlock30.5%
     Married couple, no children  Unlock55.3%42.9%
 Non Family Households5,775  Unlock43,255,233
     Single householder, w/children  Unlock7.8%15.8%
     Single householder, no children8.5%  Unlock10.8%
Reviews for Castro Valley    7 Reviews

CURMUDGEON - THANK YOU for your post. The most important part of your comment is your second paragraph. "Hodge-Podge" is the correct word for a lot of Castro  More

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Over 11 years ago

Kind of rural but close to Oakland and San  More

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Castro Valley is the largest unincorporated "city" in the Bay Area. Over the years, several attempts have been made to incorporate, but they have all been defeated at  More

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Reviews for Walnut Creek    16 Reviews

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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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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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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