2025 Compare Cities People:
Kapaa, HI vs Boulder, CO

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Highlights
- Boulder is 0% more densely populated than Kapaa.
- People are 32.8% less likely to be married in Boulder.
- The Median Age is 15.7 years younger in Boulder.
 Kapaa, HIBoulder, COUnited States
 Population  Unlock104,930329,725,481
 Female Population47.5%  Unlock50.5%
 Male Population52.5%  Unlock49.5%
 Median Age  Unlock28.938.4
 space3
 Population - 201010,060  Unlock309,327,143
 Population - 2000  Unlock94,673285,036,114
 Population - 19908,149  Unlock251,960,433
 Pop. 2000 to Now  Unlock13.7%15.6%
 Pop. 1990 to Now30.4%  Unlock30.8%
 space4
 Population Density  Unlock3,991.493.4
 Land Area10.0  Unlock3,531,905.4
 Water Area  Unlock1.0264,836.8
 space
 Est. Total Population By Age
 Kapaa, HIBoulder, COUnited States
 Age 0 to 44.9%  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 201.2%  Unlock4.0%
 Age 21 to 24  Unlock13.8%5.2%
 Age 25 to 3410.3%  Unlock13.8%
 Age 35 to 44  Unlock10.3%12.9%
 Age 45 to 5416.7%  Unlock12.6%
 Age 55 to 59  Unlock4.5%6.7%
 Age 60 to 647.5%  Unlock6.3%
 Age 65 to 74  Unlock7.0%9.6%
 Age 75 to 846.3%  Unlock4.5%
 Age 85 and over  Unlock1.8%1.9%
 space1
 Race
 Kapaa, HIBoulder, COUnited States
 White34.7%  Unlock59.4%
 Black  Unlock1.0%12.2%
 Asian29.8%  Unlock5.6%
 Native American  Unlock0.2%0.6%
 Hawaiian, Pacific Islander6.5%  Unlock0.2%
 Other  Unlock0.3%0.4%
 Two or More Races19.2%  Unlock3.2%
 Hispanic  Unlock10.6%18.4%
 space2
 Marriage & Family
 Kapaa, HIBoulder, COUnited States
 Married Population47.5%  Unlock49.8%
     Currently Married  Unlock31.2%48.0%
 Married but Separated0.2%  Unlock1.8%
 Single Population  Unlock68.1%50.2%
 Never Married34.0%  Unlock33.8%
 Divorced  Unlock9.5%10.8%
 Widowed5.3%  Unlock5.6%
 space5
 Household Size  Unlock2.212.60
 Households3,638  Unlock124,010,992
 Family Households  Unlock17,34180,755,759
     Married couple, w/children14.9%  Unlock30.5%
     Married couple, no children  Unlock47.4%42.9%
 Non Family Households1,153  Unlock43,255,233
     Single householder, w/children  Unlock10.8%15.8%
     Single householder, no children13.8%  Unlock10.8%
Reviews for Kapaa    4 Reviews

I have lived on Kaua'i, Hawai'i for about two years now, with about 20 years of prior vacationing (up to 1 month). Living here is much different than vacationing here,  More

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Over 7 years ago

My wife and I had the pleasure of visiting Kapaa in July of 2017. As tourists we found it a wonderful place. There were ample places to eat and shop for souvenirs.   More

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Over 8 years ago

For many, Kapaa is considered middle of the island in a way. Whether you are going North or going South, Kapaa seems to be a great midway point. There are tons of  More

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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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