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2025 Compare Cities People:
San Francisco, CA vs Boulder, CO

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Highlights
- Boulder is 0% more densely populated than San Francisco.
- People are 23.0% less likely to be married in Boulder.
- The Median Age is 9.8 years younger in Boulder.
 San Francisco, CABoulder, COUnited States
 Population  Unlock104,930329,725,481
 Female Population48.8%  Unlock50.5%
 Male Population51.2%  Unlock49.5%
 Median Age  Unlock28.938.4
 space3
 Population - 2010805,519  Unlock309,327,143
 Population - 2000  Unlock94,673285,036,114
 Population - 1990723,959  Unlock251,960,433
 Pop. 2000 to Now  Unlock13.7%15.6%
 Pop. 1990 to Now19.7%  Unlock30.8%
 space4
 Population Density  Unlock3,991.493.4
 Land Area46.9  Unlock3,531,905.4
 Water Area  Unlock1.0264,836.8
 space
 Est. Total Population By Age
 San Francisco, CABoulder, COUnited States
 Age 0 to 44.4%  Unlock5.9%
 Age 5 to 9  Unlock3.7%6.1%
 Age 10 to 143.7%  Unlock6.6%
 Age 15 to 17  Unlock2.5%3.9%
 Age 18 to 202.3%  Unlock4.0%
 Age 21 to 24  Unlock13.8%5.2%
 Age 25 to 3422.6%  Unlock13.8%
 Age 35 to 44  Unlock10.3%12.9%
 Age 45 to 5413.2%  Unlock12.6%
 Age 55 to 59  Unlock4.5%6.7%
 Age 60 to 645.7%  Unlock6.3%
 Age 65 to 74  Unlock7.0%9.6%
 Age 75 to 844.3%  Unlock4.5%
 Age 85 and over  Unlock1.8%1.9%
 space1
 Race
 San Francisco, CABoulder, COUnited States
 White39.2%  Unlock59.4%
 Black  Unlock1.0%12.2%
 Asian34.1%  Unlock5.6%
 Native American  Unlock0.2%0.6%
 Hawaiian, Pacific Islander0.3%  Unlock0.2%
 Other  Unlock0.3%0.4%
 Two or More Races5.3%  Unlock3.2%
 Hispanic  Unlock10.6%18.4%
 space2
 Marriage & Family
 San Francisco, CABoulder, COUnited States
 Married Population41.5%  Unlock49.8%
     Currently Married  Unlock31.2%48.0%
 Married but Separated1.4%  Unlock1.8%
 Single Population  Unlock68.1%50.2%
 Never Married46.0%  Unlock33.8%
 Divorced  Unlock9.5%10.8%
 Widowed4.5%  Unlock5.6%
 space5
 Household Size  Unlock2.212.60
 Households361,222  Unlock124,010,992
 Family Households  Unlock17,34180,755,759
     Married couple, w/children28.8%  Unlock30.5%
     Married couple, no children  Unlock47.4%42.9%
 Non Family Households190,757  Unlock43,255,233
     Single householder, w/children  Unlock10.8%15.8%
     Single householder, no children14.2%  Unlock10.8%
Voting
Reviews for San Francisco    149 Reviews
Mark · San Diego, CA
believe the bad things you hear about this place
Over 4 years ago

from a single guy's perspective. let's start this review from 2017. I moved here to be near to my sister who also relocated, and also to attend Cal State East Bay in  More

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Ross · San Francisco, CA
A Balanced Review After 10 Years
Over 4 years ago

I've lived in San Francisco for ten years. I thought I would write a balanced review for people looking to move here. My family is from places like Boise, Atlanta,  More

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Ross · San Francisco, CA
Balanced Review from 10 Year Resident
Over 4 years ago

I've lived in San Francisco for ten years. I thought I would write a balanced review for people looking to move here. My family is from places like Boise, Atlanta,  More

   |    Reply

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Reviews for Boulder    55 Reviews
Guess · Boulder, CO
Expensive and requires liking a unique culture
Over 4 years ago

Outside of the university, Boulder had a very distinctive "wealthy hippy" feel. A lot of alternative medicine and a matching ethos. This is changing some among my  More

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Linda · Boulder, CO
I love it here! Such a beautiful and friendly city
Over 5 years ago

We moved here from Texas about 4 years ago and love it here! The amazing sense of community and high regard for the environment are two of the main reasons we love  More

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H · Denver, CO
Snob says it's ok
Over 5 years ago

Most people do much worse than Boulder. I'm the most critical person I've ever met who is never happy or satisfied -- so that's a pretty huge compliment.   More

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Learn More About San Francisco, California
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