2025 Compare Cities People:
Castle Rock, CO vs Mason City, IA

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Highlights
- Mason City is 0% more densely populated than Castle Rock.
- People are 17.0% less likely to be married in Mason City.
- The Median Age is 6.8 years older in Mason City.
 Castle Rock, COMason City, IAUnited States
 Population  Unlock27,385329,725,481
 Female Population50.4%  Unlock50.5%
 Male Population49.6%  Unlock49.5%
 Median Age  Unlock42.538.4
 space3
 Population - 201048,793  Unlock309,327,143
 Population - 2000  Unlock29,172285,036,114
 Population - 19908,708  Unlock251,960,433
 Pop. 2000 to Now  Unlock-8.5%15.6%
 Pop. 1990 to Now710.4%  Unlock30.8%
 space4
 Population Density  Unlock985.393.4
 Land Area34.3  Unlock3,531,905.4
 Water Area  Unlock0.3264,836.8
 space
 Est. Total Population By Age
 Castle Rock, COMason City, IAUnited States
 Age 0 to 47.4%  Unlock5.9%
 Age 5 to 9  Unlock5.1%6.1%
 Age 10 to 147.2%  Unlock6.6%
 Age 15 to 17  Unlock3.2%3.9%
 Age 18 to 204.1%  Unlock4.0%
 Age 21 to 24  Unlock4.4%5.2%
 Age 25 to 3412.9%  Unlock13.8%
 Age 35 to 44  Unlock11.1%12.9%
 Age 45 to 5414.3%  Unlock12.6%
 Age 55 to 59  Unlock6.4%6.7%
 Age 60 to 644.7%  Unlock6.3%
 Age 65 to 74  Unlock11.7%9.6%
 Age 75 to 843.0%  Unlock4.5%
 Age 85 and over  Unlock3.3%1.9%
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 Race
 Castle Rock, COMason City, IAUnited States
 White81.6%  Unlock59.4%
 Black  Unlock2.6%12.2%
 Asian2.0%  Unlock5.6%
 Native American  Unlock0.4%0.6%
 Hawaiian, Pacific Islander0.2%  Unlock0.2%
 Other  Unlock0.1%0.4%
 Two or More Races3.8%  Unlock3.2%
 Hispanic  Unlock6.1%18.4%
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 Marriage & Family
 Castle Rock, COMason City, IAUnited States
 Married Population62.5%  Unlock49.8%
     Currently Married  Unlock50.7%48.0%
 Married but Separated0.7%  Unlock1.8%
 Single Population  Unlock48.1%50.2%
 Never Married24.5%  Unlock33.8%
 Divorced  Unlock12.0%10.8%
 Widowed3.0%  Unlock5.6%
 space5
 Household Size  Unlock2.092.60
 Households24,867  Unlock124,010,992
 Family Households  Unlock7,26480,755,759
     Married couple, w/children48.9%  Unlock30.5%
     Married couple, no children  Unlock51.4%42.9%
 Non Family Households5,755  Unlock43,255,233
     Single householder, w/children  Unlock16.5%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 Mason City    8 Reviews

I am from the area originally and have lived several places. I recently moved back from Arizona. I moved back to help with my elderly parents. If I did not have  More

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Over 13 years ago

Where to begin?? Murder,arson,abductions,beastialty,gang killings,meth labs,pantie thiefs. High utility bills, no jobs, corrupt police, evil judges, minus 40 below wind  More

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Over 14 years ago

Unless you have a tie to Mason City, such as family, don't even consider this desolate town. The population is declining rapidly for a reason. You are on an island,  More

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