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2025 Compare Cities People:
Mill Valley, CA vs South San Francisco, CA

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Highlights
- South San Francisco is 0% more densely populated than Mill Valley.
- People are 5.0% less likely to be married in South San Francisco.
- The Median Age is 5.8 years younger in South San Francisco.
 Mill Valley, CASouth San Francisco, CAUnited States
 Population  Unlock66,331329,725,481
 Female Population52.5%  Unlock50.5%
 Male Population47.5%  Unlock49.5%
 Median Age  Unlock42.138.4
 space3
 Population - 201013,934  Unlock309,327,143
 Population - 2000  Unlock60,552285,036,114
 Population - 199013,038  Unlock251,960,433
 Pop. 2000 to Now  Unlock9.9%15.6%
 Pop. 1990 to Now9.9%  Unlock30.8%
 space4
 Population Density  Unlock7,189.693.4
 Land Area4.8  Unlock3,531,905.4
 Water Area  Unlock21.0264,836.8
 space
 Est. Total Population By Age
 Mill Valley, CASouth San Francisco, CAUnited States
 Age 0 to 42.9%  Unlock5.9%
 Age 5 to 9  Unlock5.4%6.1%
 Age 10 to 146.3%  Unlock6.6%
 Age 15 to 17  Unlock2.8%3.9%
 Age 18 to 203.4%  Unlock4.0%
 Age 21 to 24  Unlock4.4%5.2%
 Age 25 to 347.3%  Unlock13.8%
 Age 35 to 44  Unlock14.1%12.9%
 Age 45 to 5418.4%  Unlock12.6%
 Age 55 to 59  Unlock7.6%6.7%
 Age 60 to 647.1%  Unlock6.3%
 Age 65 to 74  Unlock10.1%9.6%
 Age 75 to 846.5%  Unlock4.5%
 Age 85 and over  Unlock2.1%1.9%
 space1
 Race
 Mill Valley, CASouth San Francisco, CAUnited States
 White83.0%  Unlock59.4%
 Black  Unlock1.8%12.2%
 Asian6.1%  Unlock5.6%
 Native American  Unlock0.2%0.6%
 Hawaiian, Pacific Islander0.0%  Unlock0.2%
 Other  Unlock0.2%0.4%
 Two or More Races5.4%  Unlock3.2%
 Hispanic  Unlock29.8%18.4%
 space2
 Marriage & Family
 Mill Valley, CASouth San Francisco, CAUnited States
 Married Population56.1%  Unlock49.8%
     Currently Married  Unlock51.9%48.0%
 Married but Separated0.5%  Unlock1.8%
 Single Population  Unlock46.7%50.2%
 Never Married26.9%  Unlock33.8%
 Divorced  Unlock8.0%10.8%
 Widowed4.5%  Unlock5.6%
 space5
 Household Size  Unlock3.002.60
 Households5,622  Unlock124,010,992
 Family Households  Unlock16,06480,755,759
     Married couple, w/children35.2%  Unlock30.5%
     Married couple, no children  Unlock43.8%42.9%
 Non Family Households1,808  Unlock43,255,233
     Single householder, w/children  Unlock8.9%15.8%
     Single householder, no children5.6%  Unlock10.8%
Voting
Reviews for Mill Valley    7 Reviews
Thomas · Chatham, NJ
Mill Valley Tiburon wonderful
Over 4 years ago

I lived in southern Marin County for 20 years and lived it. Just moved  More

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chris · Mill Valley, CA
Pristine and Costly
Over 15 years ago

Mill Valley is a perfect place to live and raise a family, if you don't mind a cost of living index of 233. Don't distress - go mountain biking or hiking with  More

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Robbin · Mill Valley, CA
California
Over 16 years ago

Good weather all year around. Great public schools. Cost of living very high. Crime low wonderful outdoor activities nearby like hiking, beaches,  More

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Reviews for South San Francisco    5 Reviews
kim · South San Francisco, CA
SSF is probably the most misunderstood city in the
Over 12 years ago

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

   |    Reply
Dawn · South San Francisco, CA
Cloudy Days
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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Thanwa · Elk Grove, CA
Bayview Hunters Point
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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Learn More About Mill Valley, California
Overview
Cost of Living
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Voting
Learn More About South San Francisco, California
Overview
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