2025 Compare Cities People:
Sun Prairie, WI vs Quincy, IL

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Highlights
- Quincy is 0% more densely populated than Sun Prairie.
- People are 8.3% less likely to be married in Quincy.
- The Median Age is 2.4 years older in Quincy.
 Sun Prairie, WIQuincy, ILUnited States
 Population  Unlock39,687329,725,481
 Female Population51.1%  Unlock50.5%
 Male Population48.9%  Unlock49.5%
 Median Age  Unlock4038.4
 space3
 Population - 201029,627  Unlock309,327,143
 Population - 2000  Unlock40,366285,036,114
 Population - 199015,333  Unlock251,960,433
 Pop. 2000 to Now  Unlock-1.9%15.6%
 Pop. 1990 to Now129.0%  Unlock30.8%
 space4
 Population Density  Unlock2,525.993.4
 Land Area12.3  Unlock3,531,905.4
 Water Area  Unlock0.0264,836.8
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 Est. Total Population By Age
 Sun Prairie, WIQuincy, ILUnited States
 Age 0 to 46.2%  Unlock5.9%
 Age 5 to 9  Unlock6.4%6.1%
 Age 10 to 147.1%  Unlock6.6%
 Age 15 to 17  Unlock2.8%3.9%
 Age 18 to 203.1%  Unlock4.0%
 Age 21 to 24  Unlock5.4%5.2%
 Age 25 to 3413.6%  Unlock13.8%
 Age 35 to 44  Unlock11.8%12.9%
 Age 45 to 5412.1%  Unlock12.6%
 Age 55 to 59  Unlock6.5%6.7%
 Age 60 to 645.1%  Unlock6.3%
 Age 65 to 74  Unlock10.8%9.6%
 Age 75 to 843.8%  Unlock4.5%
 Age 85 and over  Unlock3.7%1.9%
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 Race
 Sun Prairie, WIQuincy, ILUnited States
 White78.2%  Unlock59.4%
 Black  Unlock6.1%12.2%
 Asian5.9%  Unlock5.6%
 Native American  Unlock0.1%0.6%
 Hawaiian, Pacific Islander0.2%  Unlock0.2%
 Other  Unlock0.0%0.4%
 Two or More Races4.2%  Unlock3.2%
 Hispanic  Unlock1.9%18.4%
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 Marriage & Family
 Sun Prairie, WIQuincy, ILUnited States
 Married Population52.5%  Unlock49.8%
     Currently Married  Unlock46.4%48.0%
 Married but Separated0.8%  Unlock1.8%
 Single Population  Unlock51.9%50.2%
 Never Married30.6%  Unlock33.8%
 Divorced  Unlock13.9%10.8%
 Widowed4.9%  Unlock5.6%
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 Household Size  Unlock2.272.60
 Households14,701  Unlock124,010,992
 Family Households  Unlock9,56580,755,759
     Married couple, w/children35.5%  Unlock30.5%
     Married couple, no children  Unlock46.1%42.9%
 Non Family Households5,664  Unlock43,255,233
     Single householder, w/children  Unlock18.5%15.8%
     Single householder, no children6.3%  Unlock10.8%
Reviews for Sun Prairie    4 Reviews

Over 6 years ago

I love it here, the weather is absolutely fantastic if you like freezing your toes off.  More

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Typically cold winters, lots of snow. Summers are typically pleasant, but can be high humidity. Poor Air Quality year round. Mild spring and fall Summer can have  More

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Over 14 years ago

Crime is very low, I seldom feel like I have to lock my car or even my house. The schools here are pretty good, and have no tolerance for bullies (so if you have any,  More

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Reviews for Quincy    21 Reviews

Over 9 years ago

I have live in quincy il since 2003 till now and it really is a nice place to raise your family no matter where you go, you going to have crime. but other than that it's  More

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I lived in Quincy for 15 years. I owned a house and participated in the local economy. My kids went to school there. The kids have fond memories of Quincy. I do not.  More

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Over 12 years ago

I haven't always lived in Quincy. I'm originally from the St. Louis area, but have moved around many times, and have also done a lot of traveling. My husband & I  More

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