2025 Compare Cities People:
San Mateo, CA vs Aliso Viejo, CA

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Highlights
- Aliso Viejo is 0% more densely populated than San Mateo.
- People are 2.2% more likely to be married in Aliso Viejo.
- The Median Age is 0.3 years younger in Aliso Viejo.
 San Mateo, CAAliso Viejo, CAUnited States
 Population  Unlock51,943329,725,481
 Female Population50.4%  Unlock50.5%
 Male Population49.6%  Unlock49.5%
 Median Age  Unlock37.438.4
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 Population - 201097,256  Unlock309,327,143
 Population - 2000  Unlock40,166285,036,114
 Population - 199085,486  Unlock251,960,433
 Pop. 2000 to Now  Unlock25.5%15.6%
 Pop. 1990 to Now19.8%  Unlock30.8%
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 Population Density  Unlock7,507.393.4
 Land Area12.2  Unlock3,531,905.4
 Water Area  Unlock0.0264,836.8
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 Est. Total Population By Age
 San Mateo, CAAliso Viejo, CAUnited States
 Age 0 to 46.7%  Unlock5.9%
 Age 5 to 9  Unlock6.9%6.1%
 Age 10 to 145.7%  Unlock6.6%
 Age 15 to 17  Unlock4.3%3.9%
 Age 18 to 202.6%  Unlock4.0%
 Age 21 to 24  Unlock4.1%5.2%
 Age 25 to 3417.5%  Unlock13.8%
 Age 35 to 44  Unlock16.2%12.9%
 Age 45 to 5412.7%  Unlock12.6%
 Age 55 to 59  Unlock7.3%6.7%
 Age 60 to 645.7%  Unlock6.3%
 Age 65 to 74  Unlock4.9%9.6%
 Age 75 to 844.8%  Unlock4.5%
 Age 85 and over  Unlock1.4%1.9%
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 Race
 San Mateo, CAAliso Viejo, CAUnited States
 White40.9%  Unlock59.4%
 Black  Unlock2.5%12.2%
 Asian25.2%  Unlock5.6%
 Native American  Unlock0.2%0.6%
 Hawaiian, Pacific Islander1.7%  Unlock0.2%
 Other  Unlock0.4%0.4%
 Two or More Races5.5%  Unlock3.2%
 Hispanic  Unlock20.0%18.4%
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 Marriage & Family
 San Mateo, CAAliso Viejo, CAUnited States
 Married Population52.6%  Unlock49.8%
     Currently Married  Unlock52.9%48.0%
 Married but Separated1.2%  Unlock1.8%
 Single Population  Unlock46.3%50.2%
 Never Married33.0%  Unlock33.8%
 Divorced  Unlock11.4%10.8%
 Widowed5.6%  Unlock5.6%
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 Household Size  Unlock2.712.60
 Households40,233  Unlock124,010,992
 Family Households  Unlock13,03380,755,759
     Married couple, w/children35.1%  Unlock30.5%
     Married couple, no children  Unlock32.8%42.9%
 Non Family Households14,813  Unlock43,255,233
     Single householder, w/children  Unlock10.3%15.8%
     Single householder, no children11.3%  Unlock10.8%
Reviews for San Mateo    12 Reviews

I have lived in San Mateo since 2013. It has seen tremendous growth, lots of new restaurants which have become progressively more high-end though there is ample  More

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I'm a native of California. I have lived in the southern part of the state and the northern part of the state for most of my life. I have spent the last 29 years in  More

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Over 15 years ago

San Mateo has a diverse mix of people, a pleasant climate, a very pleasant downtown park with lots going on, and pretty much whatever you need handy. It's not far to  More

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Reviews for Aliso Viejo    8 Reviews

We've lived here in Aliso Viejo now for two years and just love it! It's clean, extremely walkable, little to no crime and relatively affordable when compared to Los  More

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Over 4 years ago

We just moved here from the East Coast and we absolutely love it. It’s pretty peaceful, has beautiful views of the city, and it’s close to the beach and many parks.  More

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We've liked here for 4yrs now and it is one of the most convenient cities I've ever lived in. Our youngest finished their last 2 yrs of high school here and we were  More

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