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

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Highlights
- San Diego is 0% more densely populated than Boulder.
- People are 45.4% more likely to be married in San Diego.
- The Median Age is 6.5 years older in San Diego.
 Boulder, COSan Diego, CAUnited States
 Population  Unlock1,385,398329,725,481
 Female Population48.5%  Unlock50.5%
 Male Population51.5%  Unlock49.5%
 Median Age  Unlock35.438.4
 space3
 Population - 201097,724  Unlock309,327,143
 Population - 2000  Unlock1,223,400285,036,114
 Population - 199083,312  Unlock251,960,433
 Pop. 2000 to Now  Unlock16.3%15.6%
 Pop. 1990 to Now29.2%  Unlock30.8%
 space4
 Population Density  Unlock4,255.093.4
 Land Area26.3  Unlock3,531,905.4
 Water Area  Unlock46.8264,836.8
 space
 Est. Total Population By Age
 Boulder, COSan Diego, CAUnited States
 Age 0 to 42.7%  Unlock5.9%
 Age 5 to 9  Unlock5.4%6.1%
 Age 10 to 143.6%  Unlock6.6%
 Age 15 to 17  Unlock3.1%3.9%
 Age 18 to 2016.2%  Unlock4.0%
 Age 21 to 24  Unlock6.3%5.2%
 Age 25 to 3416.3%  Unlock13.8%
 Age 35 to 44  Unlock14.3%12.9%
 Age 45 to 5410.3%  Unlock12.6%
 Age 55 to 59  Unlock5.7%6.7%
 Age 60 to 644.2%  Unlock6.3%
 Age 65 to 74  Unlock8.0%9.6%
 Age 75 to 843.1%  Unlock4.5%
 Age 85 and over  Unlock1.6%1.9%
 space1
 Race
 Boulder, COSan Diego, CAUnited States
 White78.3%  Unlock59.4%
 Black  Unlock5.7%12.2%
 Asian5.9%  Unlock5.6%
 Native American  Unlock0.2%0.6%
 Hawaiian, Pacific Islander0.0%  Unlock0.2%
 Other  Unlock0.4%0.4%
 Two or More Races3.5%  Unlock3.2%
 Hispanic  Unlock30.1%18.4%
 space2
 Marriage & Family
 Boulder, COSan Diego, CAUnited States
 Married Population31.9%  Unlock49.8%
     Currently Married  Unlock44.8%48.0%
 Married but Separated0.7%  Unlock1.8%
 Single Population  Unlock53.6%50.2%
 Never Married56.1%  Unlock33.8%
 Divorced  Unlock9.5%10.8%
 Widowed2.5%  Unlock5.6%
 space5
 Household Size  Unlock2.642.60
 Households42,610  Unlock124,010,992
 Family Households  Unlock304,49980,755,759
     Married couple, w/children33.3%  Unlock30.5%
     Married couple, no children  Unlock41.9%42.9%
 Non Family Households25,269  Unlock43,255,233
     Single householder, w/children  Unlock13.4%15.8%
     Single householder, no children8.5%  Unlock10.8%
Reviews for Boulder    55 Reviews

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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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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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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Reviews for San Diego    319 Reviews

I have lived in San Diego for more than half my life (I am 30) and love it. It has something for everyone and more from arts, to sporting events, and all cuisine is  More

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The only real knock again San Diego is the cost of living, but it is paradise compared to most cities of similar size. Those who complain about the traffic here or say  More

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I have lived in San Diego since 1968 and I am now almost 62 years old. I love San Diego, I really do. But it has become so crowded and so expensive over the years. It  More

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