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

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Highlights
- Waltham is 0% more densely populated than South San Francisco.
- People are 28.2% less likely to be married in Waltham.
- The Median Age is 8.3 years younger in Waltham.
 South San Francisco, CAWaltham, MAUnited States
 Population  Unlock64,655329,725,481
 Female Population49.8%  Unlock50.5%
 Male Population50.2%  Unlock49.5%
 Median Age  Unlock33.838.4
 space3
 Population - 201063,674  Unlock309,327,143
 Population - 2000  Unlock59,226285,036,114
 Population - 199054,312  Unlock251,960,433
 Pop. 2000 to Now  Unlock4.8%15.6%
 Pop. 1990 to Now22.6%  Unlock30.8%
 space4
 Population Density  Unlock5,075.893.4
 Land Area9.2  Unlock3,531,905.4
 Water Area  Unlock1.0264,836.8
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 Est. Total Population By Age
 South San Francisco, CAWaltham, MAUnited States
 Age 0 to 44.6%  Unlock5.9%
 Age 5 to 9  Unlock3.5%6.1%
 Age 10 to 144.9%  Unlock6.6%
 Age 15 to 17  Unlock2.0%3.9%
 Age 18 to 203.1%  Unlock4.0%
 Age 21 to 24  Unlock10.9%5.2%
 Age 25 to 3414.4%  Unlock13.8%
 Age 35 to 44  Unlock12.2%12.9%
 Age 45 to 5414.8%  Unlock12.6%
 Age 55 to 59  Unlock6.4%6.7%
 Age 60 to 647.2%  Unlock6.3%
 Age 65 to 74  Unlock8.5%9.6%
 Age 75 to 844.4%  Unlock4.5%
 Age 85 and over  Unlock1.7%1.9%
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 Race
 South San Francisco, CAWaltham, MAUnited States
 White21.5%  Unlock59.4%
 Black  Unlock6.5%12.2%
 Asian42.8%  Unlock5.6%
 Native American  Unlock0.2%0.6%
 Hawaiian, Pacific Islander0.9%  Unlock0.2%
 Other  Unlock0.3%0.4%
 Two or More Races2.9%  Unlock3.2%
 Hispanic  Unlock14.5%18.4%
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 Marriage & Family
 South San Francisco, CAWaltham, MAUnited States
 Married Population53.3%  Unlock49.8%
     Currently Married  Unlock36.9%48.0%
 Married but Separated1.4%  Unlock1.8%
 Single Population  Unlock61.8%50.2%
 Never Married33.3%  Unlock33.8%
 Divorced  Unlock7.3%10.8%
 Widowed5.3%  Unlock5.6%
 space5
 Household Size  Unlock2.272.60
 Households21,895  Unlock124,010,992
 Family Households  Unlock12,67580,755,759
     Married couple, w/children31.7%  Unlock30.5%
     Married couple, no children  Unlock46.8%42.9%
 Non Family Households5,831  Unlock43,255,233
     Single householder, w/children  Unlock9.2%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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Reviews for Waltham    2 Reviews

Over 15 years ago

My husband and I moved from west of Worcester to Waltham a few months ago and are really enjoying life here. We're situated in an apartment close to Moody Street and  More

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Waltham is home to two well respected colleges/universities: Bentley and Brandeis. That, however, is not all. For within half an hour or so, by commuter train or car,  More

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