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

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Highlights
- South San Francisco is 0% more densely populated than Lafayette.
- People are 17.1% less likely to be married in South San Francisco.
- The Median Age is 2.7 years younger in South San Francisco.
 Lafayette, CASouth San Francisco, CAUnited States
 Population  Unlock66,331329,725,481
 Female Population49.0%  Unlock50.5%
 Male Population51.0%  Unlock49.5%
 Median Age  Unlock42.138.4
 space3
 Population - 201023,852  Unlock309,327,143
 Population - 2000  Unlock60,552285,036,114
 Population - 199023,501  Unlock251,960,433
 Pop. 2000 to Now  Unlock9.9%15.6%
 Pop. 1990 to Now10.6%  Unlock30.8%
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 Population Density  Unlock7,189.693.4
 Land Area15.0  Unlock3,531,905.4
 Water Area  Unlock21.0264,836.8
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 Est. Total Population By Age
 Lafayette, CASouth San Francisco, CAUnited States
 Age 0 to 44.1%  Unlock5.9%
 Age 5 to 9  Unlock5.4%6.1%
 Age 10 to 148.1%  Unlock6.6%
 Age 15 to 17  Unlock2.8%3.9%
 Age 18 to 201.8%  Unlock4.0%
 Age 21 to 24  Unlock4.4%5.2%
 Age 25 to 348.2%  Unlock13.8%
 Age 35 to 44  Unlock14.1%12.9%
 Age 45 to 5418.0%  Unlock12.6%
 Age 55 to 59  Unlock7.6%6.7%
 Age 60 to 646.4%  Unlock6.3%
 Age 65 to 74  Unlock10.1%9.6%
 Age 75 to 845.8%  Unlock4.5%
 Age 85 and over  Unlock2.1%1.9%
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 Race
 Lafayette, CASouth San Francisco, CAUnited States
 White75.3%  Unlock59.4%
 Black  Unlock1.8%12.2%
 Asian9.8%  Unlock5.6%
 Native American  Unlock0.2%0.6%
 Hawaiian, Pacific Islander0.0%  Unlock0.2%
 Other  Unlock0.2%0.4%
 Two or More Races6.4%  Unlock3.2%
 Hispanic  Unlock29.8%18.4%
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 Marriage & Family
 Lafayette, CASouth San Francisco, CAUnited States
 Married Population64.3%  Unlock49.8%
     Currently Married  Unlock51.9%48.0%
 Married but Separated1.2%  Unlock1.8%
 Single Population  Unlock46.7%50.2%
 Never Married25.0%  Unlock33.8%
 Divorced  Unlock8.0%10.8%
 Widowed3.7%  Unlock5.6%
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 Household Size  Unlock3.002.60
 Households8,917  Unlock124,010,992
 Family Households  Unlock16,06480,755,759
     Married couple, w/children40.9%  Unlock30.5%
     Married couple, no children  Unlock43.8%42.9%
 Non Family Households2,045  Unlock43,255,233
     Single householder, w/children  Unlock8.9%15.8%
     Single householder, no children4.1%  Unlock10.8%
Reviews for Lafayette    4 Reviews

Over 14 years ago

Living in Lafayette is wonderful, if you can afford it! The rolling hills, the great schools and the climate make this a great place to  More

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Great place to raise kids, nice restaurants and some good stores. A bit sparse on things like theaters etc. Weather in Summer is HOT HOT HOT. Bring sunblock and  More

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Over 18 years ago

Summers are too cool due to marine  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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