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2025 Compare Cities People:
Round Rock, TX vs Castle Rock, CO

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Highlights
- Castle Rock is 0% more densely populated than Round Rock.
- People are 18.7% more likely to be married in Castle Rock.
- The Median Age is 0.1 years older in Castle Rock.
 Round Rock, TXCastle Rock, COUnited States
 Population  Unlock71,037329,725,481
 Female Population50.8%  Unlock50.5%
 Male Population49.2%  Unlock49.5%
 Median Age  Unlock35.738.4
 space3
 Population - 2010100,774  Unlock309,327,143
 Population - 2000  Unlock20,224285,036,114
 Population - 199030,923  Unlock251,960,433
 Pop. 2000 to Now  Unlock248.9%15.6%
 Pop. 1990 to Now344.9%  Unlock30.8%
 space4
 Population Density  Unlock2,073.293.4
 Land Area36.1  Unlock3,531,905.4
 Water Area  Unlock0.0264,836.8
 space
 Est. Total Population By Age
 Round Rock, TXCastle Rock, COUnited States
 Age 0 to 45.9%  Unlock5.9%
 Age 5 to 9  Unlock8.2%6.1%
 Age 10 to 147.8%  Unlock6.6%
 Age 15 to 17  Unlock5.3%3.9%
 Age 18 to 203.5%  Unlock4.0%
 Age 21 to 24  Unlock3.6%5.2%
 Age 25 to 3413.9%  Unlock13.8%
 Age 35 to 44  Unlock16.2%12.9%
 Age 45 to 5414.2%  Unlock12.6%
 Age 55 to 59  Unlock6.1%6.7%
 Age 60 to 644.7%  Unlock6.3%
 Age 65 to 74  Unlock6.1%9.6%
 Age 75 to 841.9%  Unlock4.5%
 Age 85 and over  Unlock1.0%1.9%
 space1
 Race
 Round Rock, TXCastle Rock, COUnited States
 White50.5%  Unlock59.4%
 Black  Unlock0.5%12.2%
 Asian6.9%  Unlock5.6%
 Native American  Unlock0.3%0.6%
 Hawaiian, Pacific Islander0.2%  Unlock0.2%
 Other  Unlock0.6%0.4%
 Two or More Races3.5%  Unlock3.2%
 Hispanic  Unlock11.0%18.4%
 space2
 Marriage & Family
 Round Rock, TXCastle Rock, COUnited States
 Married Population52.7%  Unlock49.8%
     Currently Married  Unlock61.8%48.0%
 Married but Separated1.5%  Unlock1.8%
 Single Population  Unlock37.5%50.2%
 Never Married31.8%  Unlock33.8%
 Divorced  Unlock10.0%10.8%
 Widowed4.0%  Unlock5.6%
 space5
 Household Size  Unlock2.832.60
 Households43,705  Unlock124,010,992
 Family Households  Unlock19,11280,755,759
     Married couple, w/children42.0%  Unlock30.5%
     Married couple, no children  Unlock37.4%42.9%
 Non Family Households12,976  Unlock43,255,233
     Single householder, w/children  Unlock8.6%15.8%
     Single householder, no children10.3%  Unlock10.8%
Voting
Reviews for Round Rock    28 Reviews
Josh · Amarillo, TX
Relocation to Round Rock Area
Over 9 years ago

I plan on relocating from Amarillo to Round Rock or one of the suburbs north of Austin with my wife and kids. I would like to know what people can tell me about the job  More

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Brittany · Austin, TX
Market data for Round Rock
Over 9 years ago

Round Rock has a booming real estate market. It is one of the fastest growing communities in America. If you need more info about home buying in Round Rock, or anywhere  More

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M. · Ogden, UT
moved from Southern California to Round Rock TX
Over 11 years ago

We moved from Southern CA, we first lived at beach for many years in SD, then high desert (Hesperia). BEST MOVE I'VE EVER MADE IN MY LIFE!! The weather is great, the  More

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Reviews for Castle Rock    12 Reviews
Jerry · Castle Pines North, CO
Beautiful Town but Not the Best for Young Adults
Over 5 years ago

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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Ben · Castle Rock, CO
The Unforgettable Sunset
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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charlie · Castle Rock, CO
mountains of enjoyment
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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Learn More About Round Rock, Texas
Overview
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Learn More About Castle Rock, Colorado
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