2025 Compare Cities People:
Petaluma, CA vs San Mateo, CA

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Highlights
- San Mateo is 0% more densely populated than Petaluma.
- People are 1.5% less likely to be married in San Mateo.
- The Median Age is 5.1 years younger in San Mateo.
 Petaluma, CASan Mateo, CAUnited States
 Population  Unlock105,087329,725,481
 Female Population50.1%  Unlock50.5%
 Male Population49.9%  Unlock49.5%
 Median Age  Unlock37.738.4
 space3
 Population - 201058,048  Unlock309,327,143
 Population - 2000  Unlock92,482285,036,114
 Population - 199043,184  Unlock251,960,433
 Pop. 2000 to Now  Unlock10.7%15.6%
 Pop. 1990 to Now40.4%  Unlock30.8%
 space4
 Population Density  Unlock8,632.893.4
 Land Area14.4  Unlock3,531,905.4
 Water Area  Unlock3.7264,836.8
 space
 Est. Total Population By Age
 Petaluma, CASan Mateo, CAUnited States
 Age 0 to 45.0%  Unlock5.9%
 Age 5 to 9  Unlock5.6%6.1%
 Age 10 to 146.1%  Unlock6.6%
 Age 15 to 17  Unlock2.7%3.9%
 Age 18 to 203.1%  Unlock4.0%
 Age 21 to 24  Unlock4.1%5.2%
 Age 25 to 3412.7%  Unlock13.8%
 Age 35 to 44  Unlock15.4%12.9%
 Age 45 to 5413.5%  Unlock12.6%
 Age 55 to 59  Unlock5.8%6.7%
 Age 60 to 647.3%  Unlock6.3%
 Age 65 to 74  Unlock8.0%9.6%
 Age 75 to 845.0%  Unlock4.5%
 Age 85 and over  Unlock2.8%1.9%
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 Race
 Petaluma, CASan Mateo, CAUnited States
 White68.1%  Unlock59.4%
 Black  Unlock1.9%12.2%
 Asian4.1%  Unlock5.6%
 Native American  Unlock0.1%0.6%
 Hawaiian, Pacific Islander0.0%  Unlock0.2%
 Other  Unlock0.6%0.4%
 Two or More Races4.4%  Unlock3.2%
 Hispanic  Unlock24.1%18.4%
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 Marriage & Family
 Petaluma, CASan Mateo, CAUnited States
 Married Population53.4%  Unlock49.8%
     Currently Married  Unlock51.3%48.0%
 Married but Separated1.5%  Unlock1.8%
 Single Population  Unlock47.4%50.2%
 Never Married30.0%  Unlock33.8%
 Divorced  Unlock8.9%10.8%
 Widowed5.0%  Unlock5.6%
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 Household Size  Unlock2.582.60
 Households22,756  Unlock124,010,992
 Family Households  Unlock25,42080,755,759
     Married couple, w/children34.8%  Unlock30.5%
     Married couple, no children  Unlock43.3%42.9%
 Non Family Households7,697  Unlock43,255,233
     Single householder, w/children  Unlock10.4%15.8%
     Single householder, no children8.1%  Unlock10.8%
Reviews for Petaluma    16 Reviews

I agree with the low star reviews. Been here for 25 years, raised a family and seen everything turn to the left and worse. Weather is glorious, love the old Victorians  More

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We’ve lived here for 3 years and we love it. It has taken some time to grow on us. We moved from SF where we had lived over 15 years, we were not used to one year leases  More

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I’ve lived here a couple of years (after living in others parts of the Bay Area for 15+ years) and I love it! Great neighborhoods, friendly folks, good schools with  More

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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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