2026 Compare Cities People:
Plano, TX vs Castle Rock, CO

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Highlights
- Castle Rock is 0% more densely populated than Plano.
- People are 7.7% more likely to be married in Castle Rock.
- The Median Age is 3.1 years younger in Castle Rock.
 Plano, TXCastle Rock, COUnited States
 Population  Unlock71,037329,725,481
 Female Population50.4%  Unlock50.5%
 Male Population49.6%  Unlock49.5%
 Median Age  Unlock35.738.4
 space3
 Population - 2010261,240  Unlock309,327,143
 Population - 2000  Unlock20,224285,036,114
 Population - 1990128,713  Unlock251,960,433
 Pop. 2000 to Now  Unlock248.9%15.6%
 Pop. 1990 to Now126.3%  Unlock30.8%
 space4
 Population Density  Unlock2,073.293.4
 Land Area71.7  Unlock3,531,905.4
 Water Area  Unlock0.0264,836.8
 space
 Est. Total Population By Age
 Plano, TXCastle Rock, COUnited States
 Age 0 to 45.6%  Unlock5.9%
 Age 5 to 9  Unlock8.2%6.1%
 Age 10 to 146.7%  Unlock6.6%
 Age 15 to 17  Unlock5.3%3.9%
 Age 18 to 203.4%  Unlock4.0%
 Age 21 to 24  Unlock3.6%5.2%
 Age 25 to 3413.6%  Unlock13.8%
 Age 35 to 44  Unlock16.2%12.9%
 Age 45 to 5413.8%  Unlock12.6%
 Age 55 to 59  Unlock6.1%6.7%
 Age 60 to 646.0%  Unlock6.3%
 Age 65 to 74  Unlock6.1%9.6%
 Age 75 to 843.5%  Unlock4.5%
 Age 85 and over  Unlock1.0%1.9%
 space1
 Race
 Plano, TXCastle Rock, COUnited States
 White49.8%  Unlock59.4%
 Black  Unlock0.5%12.2%
 Asian22.2%  Unlock5.6%
 Native American  Unlock0.3%0.6%
 Hawaiian, Pacific Islander0.1%  Unlock0.2%
 Other  Unlock0.6%0.4%
 Two or More Races2.8%  Unlock3.2%
 Hispanic  Unlock11.0%18.4%
 space2
 Marriage & Family
 Plano, TXCastle Rock, COUnited States
 Married Population58.1%  Unlock49.8%
     Currently Married  Unlock61.8%48.0%
 Married but Separated1.1%  Unlock1.8%
 Single Population  Unlock37.5%50.2%
 Never Married28.3%  Unlock33.8%
 Divorced  Unlock10.0%10.8%
 Widowed3.9%  Unlock5.6%
 space5
 Household Size  Unlock2.832.60
 Households106,022  Unlock124,010,992
 Family Households  Unlock19,11280,755,759
     Married couple, w/children38.4%  Unlock30.5%
     Married couple, no children  Unlock37.4%42.9%
 Non Family Households30,778  Unlock43,255,233
     Single householder, w/children  Unlock8.6%15.8%
     Single householder, no children9.3%  Unlock10.8%
Reviews for Plano    42 Reviews

I had lived in Plano for over 30 years. It is where I bought my first home as a single woman, where I married, and where I raised my children. I was fortunate enough  More

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We have lived in Plano for 20 years. It has been consistently rated very highly in surveys of best places to live in the US. Pros are the parks system; which includes  More

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Over 5 years ago

I've lived here for a while now. It's wonderful here. There's a ton to do, great jobs, great parks, and pretty good school. It's the perfect  More

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Reviews for Castle Rock    12 Reviews

My fiance and I moved here in 2018 shortly after finishing college. I work in Colorado Springs and she works in the Denver area, so Castle Rock was practically our only  More

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Over 8 years ago

I have always been mobile for my career, until I moved to Castle Rock. I've lived in in multiple cities in the Midwest including Chicago and have visited nearly every  More

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Over 12 years ago

we have four seasons, and the rockies are only two hrs.away. so for the outdoors enthusist sking or hiking is like no other place you have been or seen it is hard to  More

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