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2025 Compare Cities People:
Fairfield, CA vs Castro Valley, CA

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Highlights
- Castro Valley is 0% more densely populated than Fairfield.
- People are 8.4% more likely to be married in Castro Valley.
- The Median Age is 7.2 years older in Castro Valley.
 Fairfield, CACastro Valley, CAUnited States
 Population  Unlock66,324329,725,481
 Female Population50.1%  Unlock50.5%
 Male Population49.9%  Unlock49.5%
 Median Age  Unlock42.438.4
 space3
 Population - 2010105,652  Unlock309,327,143
 Population - 2000  Unlock57,292285,036,114
 Population - 199077,211  Unlock251,960,433
 Pop. 2000 to Now  Unlock13.0%15.6%
 Pop. 1990 to Now52.3%  Unlock30.8%
 space4
 Population Density  Unlock3,997.893.4
 Land Area41.0  Unlock3,531,905.4
 Water Area  Unlock0.2264,836.8
 space
 Est. Total Population By Age
 Fairfield, CACastro Valley, CAUnited States
 Age 0 to 47.4%  Unlock5.9%
 Age 5 to 9  Unlock6.1%6.1%
 Age 10 to 147.6%  Unlock6.6%
 Age 15 to 17  Unlock4.3%3.9%
 Age 18 to 203.6%  Unlock4.0%
 Age 21 to 24  Unlock3.5%5.2%
 Age 25 to 3415.5%  Unlock13.8%
 Age 35 to 44  Unlock14.4%12.9%
 Age 45 to 5412.3%  Unlock12.6%
 Age 55 to 59  Unlock7.8%6.7%
 Age 60 to 645.5%  Unlock6.3%
 Age 65 to 74  Unlock10.4%9.6%
 Age 75 to 843.7%  Unlock4.5%
 Age 85 and over  Unlock2.4%1.9%
 space1
 Race
 Fairfield, CACastro Valley, CAUnited States
 White29.0%  Unlock59.4%
 Black  Unlock9.3%12.2%
 Asian17.4%  Unlock5.6%
 Native American  Unlock0.5%0.6%
 Hawaiian, Pacific Islander1.2%  Unlock0.2%
 Other  Unlock0.3%0.4%
 Two or More Races6.7%  Unlock3.2%
 Hispanic  Unlock16.9%18.4%
 space2
 Marriage & Family
 Fairfield, CACastro Valley, CAUnited States
 Married Population51.5%  Unlock49.8%
     Currently Married  Unlock54.5%48.0%
 Married but Separated2.3%  Unlock1.8%
 Single Population  Unlock44.2%50.2%
 Never Married35.1%  Unlock33.8%
 Divorced  Unlock8.4%10.8%
 Widowed4.9%  Unlock5.6%
 space5
 Household Size  Unlock2.902.60
 Households37,176  Unlock124,010,992
 Family Households  Unlock16,69280,755,759
     Married couple, w/children34.1%  Unlock30.5%
     Married couple, no children  Unlock45.3%42.9%
 Non Family Households9,139  Unlock43,255,233
     Single householder, w/children  Unlock11.2%15.8%
     Single householder, no children11.0%  Unlock10.8%
Voting
Reviews for Fairfield    10 Reviews
Debra · Fairfield, CA
Fairfield is Dead
Over 5 years ago

I've lived here for 4 years. On the up side, housing is affordable. The downside, there is nothing to do here. The city lacks community events and an a nice downtown. We  More

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Melanie · Fairfield, CA
Housing Too Expensive
Over 10 years ago

I am finding out the cost of living here in Fairfield is way too high for my retirement. I am looking for a place where the cost of living is in line with my retirement  More

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mario · Fairfield, CA
good
Over 14 years ago

good  More

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Reviews for Castro Valley    7 Reviews
Ken · Walnut Creek, CA
2015 review of Castro Valley, CA
Over 10 years ago

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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Doug · Castro Valley, CA
Close to the big cities
Over 11 years ago

Kind of rural but close to Oakland and San  More

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Curmudgeon · Castro Valley, CA
Castro Valley Needs to Incorporate
Over 12 years ago

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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Learn More About Fairfield, California
Overview
Cost of Living
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Learn More About Castro Valley, California
Overview
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