2025 Compare Cities People:
Decatur, IL vs St. Louis, MO

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Highlights
- St. Louis is 0% more densely populated than Decatur.
- People are 20.8% less likely to be married in St. Louis.
- The Median Age is 3.6 years younger in St. Louis.
 Decatur, ILSt. Louis, MOUnited States
 Population  Unlock302,787329,725,481
 Female Population52.7%  Unlock50.5%
 Male Population47.3%  Unlock49.5%
 Median Age  Unlock36.338.4
 space3
 Population - 201076,095  Unlock309,327,143
 Population - 2000  Unlock348,189285,036,114
 Population - 199083,885  Unlock251,960,433
 Pop. 2000 to Now  Unlock-14.5%15.6%
 Pop. 1990 to Now-16.5%  Unlock30.8%
 space4
 Population Density  Unlock4,903.993.4
 Land Area42.3  Unlock3,531,905.4
 Water Area  Unlock4.3264,836.8
 space
 Est. Total Population By Age
 Decatur, ILSt. Louis, MOUnited States
 Age 0 to 46.0%  Unlock5.9%
 Age 5 to 9  Unlock4.8%6.1%
 Age 10 to 145.7%  Unlock6.6%
 Age 15 to 17  Unlock2.8%3.9%
 Age 18 to 204.7%  Unlock4.0%
 Age 21 to 24  Unlock5.4%5.2%
 Age 25 to 3413.2%  Unlock13.8%
 Age 35 to 44  Unlock13.7%12.9%
 Age 45 to 5410.8%  Unlock12.6%
 Age 55 to 59  Unlock6.4%6.7%
 Age 60 to 646.8%  Unlock6.3%
 Age 65 to 74  Unlock8.8%9.6%
 Age 75 to 845.7%  Unlock4.5%
 Age 85 and over  Unlock1.7%1.9%
 space1
 Race
 Decatur, ILSt. Louis, MOUnited States
 White67.5%  Unlock59.4%
 Black  Unlock44.6%12.2%
 Asian1.4%  Unlock5.6%
 Native American  Unlock0.2%0.6%
 Hawaiian, Pacific Islander0.1%  Unlock0.2%
 Other  Unlock0.4%0.4%
 Two or More Races4.9%  Unlock3.2%
 Hispanic  Unlock4.2%18.4%
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 Marriage & Family
 Decatur, ILSt. Louis, MOUnited States
 Married Population42.5%  Unlock49.8%
     Currently Married  Unlock30.7%48.0%
 Married but Separated1.4%  Unlock1.8%
 Single Population  Unlock66.4%50.2%
 Never Married35.7%  Unlock33.8%
 Divorced  Unlock12.3%10.8%
 Widowed7.8%  Unlock5.6%
 space5
 Household Size  Unlock2.082.60
 Households30,718  Unlock124,010,992
 Family Households  Unlock62,55980,755,759
     Married couple, w/children20.5%  Unlock30.5%
     Married couple, no children  Unlock36.1%42.9%
 Non Family Households14,383  Unlock43,255,233
     Single householder, w/children  Unlock26.9%15.8%
     Single householder, no children11.4%  Unlock10.8%
Reviews for Decatur    14 Reviews

I was sent here by the company I worked for in the '90's and was not initially impressed with midwest living. However, over the years I got used to living in the "Pride  More

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I grew up in Decatur and I still have family there, but it depresses me to see what it has become. It has a high unemployment rate, many business have closed or are run  More

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Over 14 years ago

If you enjoy drinking & driving, Decatur's fifteen drive-thru liquor windows, three times the # of drive-thru's than the ten largest cities in Illinois, COMBINED, will  More

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Reviews for St. Louis    113 Reviews

I'm 65 and lived here my entire life. Growing up in St. Louis I've learned there is a like to like about it. Lots of first class Hospitals and Doctors, LOTS of great  More

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This is an outsider's perspective on St. Louis. Sometimes a fresh perspective looking in from the outside is helpful. I don't live there as of this writing (Dec 22) but  More

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Over 3 years ago

I have travelled extensively and have lived in several other cities around the country. I chose to live in St. Louis city because it has many big city amenities with an  More

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