2025 Compare Cities People:
South San Francisco, CA vs Petaluma, CA

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Highlights
- Petaluma is 0% more densely populated than South San Francisco.
- People are 0.2% more likely to be married in Petaluma.
- The Median Age is 0.7 years older in Petaluma.
 South San Francisco, CAPetaluma, CAUnited States
 Population  Unlock60,050329,725,481
 Female Population49.8%  Unlock50.5%
 Male Population50.2%  Unlock49.5%
 Median Age  Unlock42.838.4
 space3
 Population - 201063,674  Unlock309,327,143
 Population - 2000  Unlock54,548285,036,114
 Population - 199054,312  Unlock251,960,433
 Pop. 2000 to Now  Unlock11.2%15.6%
 Pop. 1990 to Now22.6%  Unlock30.8%
 space4
 Population Density  Unlock4,175.493.4
 Land Area9.2  Unlock3,531,905.4
 Water Area  Unlock0.1264,836.8
 space
 Est. Total Population By Age
 South San Francisco, CAPetaluma, CAUnited States
 Age 0 to 44.6%  Unlock5.9%
 Age 5 to 9  Unlock5.5%6.1%
 Age 10 to 144.9%  Unlock6.6%
 Age 15 to 17  Unlock4.0%3.9%
 Age 18 to 203.1%  Unlock4.0%
 Age 21 to 24  Unlock3.0%5.2%
 Age 25 to 3414.4%  Unlock13.8%
 Age 35 to 44  Unlock13.7%12.9%
 Age 45 to 5414.8%  Unlock12.6%
 Age 55 to 59  Unlock7.4%6.7%
 Age 60 to 647.2%  Unlock6.3%
 Age 65 to 74  Unlock11.1%9.6%
 Age 75 to 844.4%  Unlock4.5%
 Age 85 and over  Unlock2.6%1.9%
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 Race
 South San Francisco, CAPetaluma, CAUnited States
 White21.5%  Unlock59.4%
 Black  Unlock1.3%12.2%
 Asian42.8%  Unlock5.6%
 Native American  Unlock0.2%0.6%
 Hawaiian, Pacific Islander0.9%  Unlock0.2%
 Other  Unlock0.2%0.4%
 Two or More Races2.9%  Unlock3.2%
 Hispanic  Unlock21.6%18.4%
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 Marriage & Family
 South San Francisco, CAPetaluma, CAUnited States
 Married Population53.3%  Unlock49.8%
     Currently Married  Unlock51.8%48.0%
 Married but Separated1.4%  Unlock1.8%
 Single Population  Unlock46.6%50.2%
 Never Married33.3%  Unlock33.8%
 Divorced  Unlock11.6%10.8%
 Widowed5.3%  Unlock5.6%
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 Household Size  Unlock2.612.60
 Households21,895  Unlock124,010,992
 Family Households  Unlock15,05980,755,759
     Married couple, w/children31.7%  Unlock30.5%
     Married couple, no children  Unlock45.5%42.9%
 Non Family Households5,831  Unlock43,255,233
     Single householder, w/children  Unlock11.6%15.8%
     Single householder, no children15.6%  Unlock10.8%
Reviews for South San Francisco    5 Reviews

It's amazing, but many, many people, including people who live in SF, think that SSF is just a part of SF. Not true. We're right across the highway from SFO, which is  More

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Over 17 years ago

One frustrating thing about South City weather is the number of overcast & foggy days, as compared to other nearby cities on the Peninsula. You can literally look  More

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Over 19 years ago

Been living in bayview hunters point for about 12 years now. What I can say that it's a rough place to live, no one cares about us and the mayor of San Francisco  More

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Start Your Review of South San Francisco

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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Start Your Review of Petaluma


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