2025 Compare Cities People:
Somerville, MA vs South San Francisco, CA

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Highlights
- South San Francisco is 0% more densely populated than Somerville.
- People are 59.4% more likely to be married in South San Francisco.
- The Median Age is 10.3 years older in South San Francisco.
 Somerville, MASouth San Francisco, CAUnited States
 Population  Unlock66,331329,725,481
 Female Population49.9%  Unlock50.5%
 Male Population50.1%  Unlock49.5%
 Median Age  Unlock42.138.4
 space3
 Population - 201075,870  Unlock309,327,143
 Population - 2000  Unlock60,552285,036,114
 Population - 199076,210  Unlock251,960,433
 Pop. 2000 to Now  Unlock9.9%15.6%
 Pop. 1990 to Now6.2%  Unlock30.8%
 space4
 Population Density  Unlock7,189.693.4
 Land Area4.1  Unlock3,531,905.4
 Water Area  Unlock21.0264,836.8
 space
 Est. Total Population By Age
 Somerville, MASouth San Francisco, CAUnited States
 Age 0 to 44.0%  Unlock5.9%
 Age 5 to 9  Unlock5.4%6.1%
 Age 10 to 142.2%  Unlock6.6%
 Age 15 to 17  Unlock2.8%3.9%
 Age 18 to 204.7%  Unlock4.0%
 Age 21 to 24  Unlock4.4%5.2%
 Age 25 to 3433.1%  Unlock13.8%
 Age 35 to 44  Unlock14.1%12.9%
 Age 45 to 549.2%  Unlock12.6%
 Age 55 to 59  Unlock7.6%6.7%
 Age 60 to 644.3%  Unlock6.3%
 Age 65 to 74  Unlock10.1%9.6%
 Age 75 to 842.7%  Unlock4.5%
 Age 85 and over  Unlock2.1%1.9%
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 Race
 Somerville, MASouth San Francisco, CAUnited States
 White68.8%  Unlock59.4%
 Black  Unlock1.8%12.2%
 Asian9.3%  Unlock5.6%
 Native American  Unlock0.2%0.6%
 Hawaiian, Pacific Islander0.0%  Unlock0.2%
 Other  Unlock0.2%0.4%
 Two or More Races3.8%  Unlock3.2%
 Hispanic  Unlock29.8%18.4%
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 Marriage & Family
 Somerville, MASouth San Francisco, CAUnited States
 Married Population33.4%  Unlock49.8%
     Currently Married  Unlock51.9%48.0%
 Married but Separated1.0%  Unlock1.8%
 Single Population  Unlock46.7%50.2%
 Never Married58.0%  Unlock33.8%
 Divorced  Unlock8.0%10.8%
 Widowed2.9%  Unlock5.6%
 space5
 Household Size  Unlock3.002.60
 Households34,523  Unlock124,010,992
 Family Households  Unlock16,06480,755,759
     Married couple, w/children28.2%  Unlock30.5%
     Married couple, no children  Unlock43.8%42.9%
 Non Family Households20,884  Unlock43,255,233
     Single householder, w/children  Unlock8.9%15.8%
     Single householder, no children12.1%  Unlock10.8%
Reviews for Somerville    3 Reviews

I've lived in Somerville/Cambridge for 10 years, the last 4.5 with my husband in Spring Hill. It really is a great place to live if you are in your 20s & 30s: it is  More

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Living in Somerville is OK. I'm not a 'city' person and I would rather be out in the country some place, but it's not too bad here. I'm in my early 50s and own a house.  More

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Over 17 years ago

we are midwest transplants to the Boston area and lucked out by finding this great little neighborhood - right on the train line, little stores and good community - we  More

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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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