2025 Compare Cities People:
Thornton, CO vs Diamond Bar, CA

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Highlights
- Diamond Bar is 0% more densely populated than Thornton.
- People are 7.7% more likely to be married in Diamond Bar.
- The Median Age is 10.0 years older in Diamond Bar.
 Thornton, CODiamond Bar, CAUnited States
 Population  Unlock55,339329,725,481
 Female Population49.6%  Unlock50.5%
 Male Population50.4%  Unlock49.5%
 Median Age  Unlock43.738.4
 space3
 Population - 2010119,544  Unlock309,327,143
 Population - 2000  Unlock56,287285,036,114
 Population - 199055,031  Unlock251,960,433
 Pop. 2000 to Now  Unlock-2.5%15.6%
 Pop. 1990 to Now169.1%  Unlock30.8%
 space4
 Population Density  Unlock3,721.593.4
 Land Area35.3  Unlock3,531,905.4
 Water Area  Unlock0.0264,836.8
 space
 Est. Total Population By Age
 Thornton, CODiamond Bar, CAUnited States
 Age 0 to 46.9%  Unlock5.9%
 Age 5 to 9  Unlock5.4%6.1%
 Age 10 to 148.9%  Unlock6.6%
 Age 15 to 17  Unlock3.4%3.9%
 Age 18 to 203.3%  Unlock4.0%
 Age 21 to 24  Unlock4.1%5.2%
 Age 25 to 3416.0%  Unlock13.8%
 Age 35 to 44  Unlock12.4%12.9%
 Age 45 to 5412.9%  Unlock12.6%
 Age 55 to 59  Unlock8.2%6.7%
 Age 60 to 644.1%  Unlock6.3%
 Age 65 to 74  Unlock12.6%9.6%
 Age 75 to 842.6%  Unlock4.5%
 Age 85 and over  Unlock1.8%1.9%
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 Race
 Thornton, CODiamond Bar, CAUnited States
 White52.7%  Unlock59.4%
 Black  Unlock4.0%12.2%
 Asian5.1%  Unlock5.6%
 Native American  Unlock0.2%0.6%
 Hawaiian, Pacific Islander0.0%  Unlock0.2%
 Other  Unlock0.4%0.4%
 Two or More Races3.3%  Unlock3.2%
 Hispanic  Unlock17.8%18.4%
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 Marriage & Family
 Thornton, CODiamond Bar, CAUnited States
 Married Population53.7%  Unlock49.8%
     Currently Married  Unlock57.2%48.0%
 Married but Separated1.3%  Unlock1.8%
 Single Population  Unlock42.2%50.2%
 Never Married32.6%  Unlock33.8%
 Divorced  Unlock7.6%10.8%
 Widowed3.2%  Unlock5.6%
 space5
 Household Size  Unlock3.102.60
 Households47,599  Unlock124,010,992
 Family Households  Unlock14,44680,755,759
     Married couple, w/children40.7%  Unlock30.5%
     Married couple, no children  Unlock47.1%42.9%
 Non Family Households13,584  Unlock43,255,233
     Single householder, w/children  Unlock8.7%15.8%
     Single householder, no children7.8%  Unlock10.8%
Reviews for Thornton    5 Reviews

Good place. Very suburbany (similar to the Springs). The houses are very small and old and yet still very expensive (albeit cheaper than southern Denver). Actually lots  More

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Over 5 years ago

I like Denver metro, but some cities aren’t too great. Thornton being one of them. Moved here because of highway access, and convenience to DIA for business travel. Am  More

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Over 10 years ago

The quality of life here in not good. The traffic is bad all the time. To try to get to the mountains takes forever! Also most lakes along the front range you can't even  More

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Reviews for Diamond Bar    3 Reviews

Over 14 years ago

Beautiful city and great place to raise a family. The worst part of Diamond Bar would be some of the best places to live in other cities. Diamond Bar has some of the  More

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Over 14 years ago

The city is centrally located to riverside, San Bernardino, Orange County and Downtown La. It is very scenic with beautiful hills, great schools and within easy reach,  More

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Over 15 years ago

This is a very quiet area about 30 mile east of downtown Los Angeles. I'm a bit concerned about what effect a possible new NFL stadium in the City of Industry CA will  More

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