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2025 Compare Cities People:
Arnold, MO vs Marion, IL

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Highlights
- Marion is 0% more densely populated than Arnold.
- People are 20.0% less likely to be married in Marion.
- The Median Age is 1.7 years younger in Marion.
 Arnold, MOMarion, ILUnited States
 Population  Unlock16,960329,725,481
 Female Population50.8%  Unlock50.5%
 Male Population49.2%  Unlock49.5%
 Median Age  Unlock40.538.4
 space3
 Population - 201020,875  Unlock309,327,143
 Population - 2000  Unlock16,035285,036,114
 Population - 199018,828  Unlock251,960,433
 Pop. 2000 to Now  Unlock8.6%15.6%
 Pop. 1990 to Now12.3%  Unlock30.8%
 space4
 Population Density  Unlock1,029.493.4
 Land Area11.6  Unlock3,531,905.4
 Water Area  Unlock0.2264,836.8
 space
 Est. Total Population By Age
 Arnold, MOMarion, ILUnited States
 Age 0 to 45.7%  Unlock5.9%
 Age 5 to 9  Unlock6.4%6.1%
 Age 10 to 145.4%  Unlock6.6%
 Age 15 to 17  Unlock3.3%3.9%
 Age 18 to 202.8%  Unlock4.0%
 Age 21 to 24  Unlock3.5%5.2%
 Age 25 to 3414.9%  Unlock13.8%
 Age 35 to 44  Unlock15.1%12.9%
 Age 45 to 5412.6%  Unlock12.6%
 Age 55 to 59  Unlock4.1%6.7%
 Age 60 to 647.5%  Unlock6.3%
 Age 65 to 74  Unlock13.9%9.6%
 Age 75 to 846.0%  Unlock4.5%
 Age 85 and over  Unlock2.5%1.9%
 space1
 Race
 Arnold, MOMarion, ILUnited States
 White90.4%  Unlock59.4%
 Black  Unlock8.0%12.2%
 Asian0.6%  Unlock5.6%
 Native American  Unlock0.0%0.6%
 Hawaiian, Pacific Islander0.0%  Unlock0.2%
 Other  Unlock0.1%0.4%
 Two or More Races6.0%  Unlock3.2%
 Hispanic  Unlock1.7%18.4%
 space2
 Marriage & Family
 Arnold, MOMarion, ILUnited States
 Married Population53.4%  Unlock49.8%
     Currently Married  Unlock41.5%48.0%
 Married but Separated2.9%  Unlock1.8%
 Single Population  Unlock57.3%50.2%
 Never Married25.8%  Unlock33.8%
 Divorced  Unlock16.1%10.8%
 Widowed7.4%  Unlock5.6%
 space5
 Household Size  Unlock2.072.60
 Households8,405  Unlock124,010,992
 Family Households  Unlock4,08380,755,759
     Married couple, w/children30.9%  Unlock30.5%
     Married couple, no children  Unlock46.4%42.9%
 Non Family Households2,875  Unlock43,255,233
     Single householder, w/children  Unlock23.0%15.8%
     Single householder, no children8.0%  Unlock10.8%
Voting
Reviews for Arnold    1 Reviews
JT · Clermont, FL
Newly transplanted here!
Over 16 years ago

My husband's family lives in the area (Crestwood, Barnhart, Fenton, Ballwin), we have been visiting for about 20 years. We moved from a southern state which had it  More

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Reviews for Marion    2 Reviews
Rosalyn · Ogden, UT
crime
Over 10 years ago

I moved from Marion, IL a short time ago and would like to explain what happened to me there. My house was shot by a BB gun several times and ruined some of the siding.  More

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josh · Marion, IL
marion growth ideas
Over 18 years ago

marion is a great place for young people to get going in thier lives. marion is also a great place to retire at. marion needs more young people spots and i think marion  More

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Learn More About Arnold, Missouri
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