2025 Compare Cities People:
Castle Rock, CO vs Flagstaff, AZ

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Highlights
- Flagstaff is 0% more densely populated than Castle Rock.
- People are 47.2% less likely to be married in Flagstaff.
- The Median Age is 9.9 years younger in Flagstaff.
 Castle Rock, COFlagstaff, AZUnited States
 Population  Unlock76,228329,725,481
 Female Population50.4%  Unlock50.5%
 Male Population49.6%  Unlock49.5%
 Median Age  Unlock25.838.4
 space3
 Population - 201048,793  Unlock309,327,143
 Population - 2000  Unlock52,894285,036,114
 Population - 19908,708  Unlock251,960,433
 Pop. 2000 to Now  Unlock39.8%15.6%
 Pop. 1990 to Now710.4%  Unlock30.8%
 space4
 Population Density  Unlock1,154.693.4
 Land Area34.3  Unlock3,531,905.4
 Water Area  Unlock0.1264,836.8
 space
 Est. Total Population By Age
 Castle Rock, COFlagstaff, AZUnited States
 Age 0 to 47.4%  Unlock5.9%
 Age 5 to 9  Unlock4.8%6.1%
 Age 10 to 147.2%  Unlock6.6%
 Age 15 to 17  Unlock3.1%3.9%
 Age 18 to 204.1%  Unlock4.0%
 Age 21 to 24  Unlock11.4%5.2%
 Age 25 to 3412.9%  Unlock13.8%
 Age 35 to 44  Unlock10.7%12.9%
 Age 45 to 5414.3%  Unlock12.6%
 Age 55 to 59  Unlock4.1%6.7%
 Age 60 to 644.7%  Unlock6.3%
 Age 65 to 74  Unlock5.8%9.6%
 Age 75 to 843.0%  Unlock4.5%
 Age 85 and over  Unlock0.5%1.9%
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 Race
 Castle Rock, COFlagstaff, AZUnited States
 White81.6%  Unlock59.4%
 Black  Unlock1.5%12.2%
 Asian2.0%  Unlock5.6%
 Native American  Unlock8.6%0.6%
 Hawaiian, Pacific Islander0.2%  Unlock0.2%
 Other  Unlock0.4%0.4%
 Two or More Races3.8%  Unlock3.2%
 Hispanic  Unlock18.9%18.4%
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 Marriage & Family
 Castle Rock, COFlagstaff, AZUnited States
 Married Population62.5%  Unlock49.8%
     Currently Married  Unlock32.2%48.0%
 Married but Separated0.7%  Unlock1.8%
 Single Population  Unlock67.0%50.2%
 Never Married24.5%  Unlock33.8%
 Divorced  Unlock9.0%10.8%
 Widowed3.0%  Unlock5.6%
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 Household Size  Unlock2.402.60
 Households24,867  Unlock124,010,992
 Family Households  Unlock13,51980,755,759
     Married couple, w/children48.9%  Unlock30.5%
     Married couple, no children  Unlock41.3%42.9%
 Non Family Households5,755  Unlock43,255,233
     Single householder, w/children  Unlock15.5%15.8%
     Single householder, no children5.1%  Unlock10.8%
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 7 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 11 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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Reviews for Flagstaff    50 Reviews

Amber · 

Flagstaff is absolutely the perfect place to call home. Especially for families. 4 perfectly balanced seasons. None too extreme and all beautiful. Ridiculously safe!  More

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Leah · 

I've lived here for one year and have to move because the cost to rent here is astronomical. I've been paying $2550/month and now for a comparable home it is $2900 and  More

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Every place depends on what you are looking for. So I will say a bit about me so you can assess where the review is coming from. I am a professional, single, female  More

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