2026 Compare Cities People:
Decatur, IL vs Billings, MT

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Highlights
- Billings is 0% more densely populated than Decatur.
- People are 13.7% more likely to be married in Billings.
- The Median Age is 2.3 years younger in Billings.
 Decatur, ILBillings, MTUnited States
 Population  Unlock115,689329,725,481
 Female Population52.7%  Unlock50.5%
 Male Population47.3%  Unlock49.5%
 Median Age  Unlock37.638.4
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 Population - 201076,095  Unlock309,327,143
 Population - 2000  Unlock89,847285,036,114
 Population - 199083,885  Unlock251,960,433
 Pop. 2000 to Now  Unlock22.1%15.6%
 Pop. 1990 to Now-16.5%  Unlock30.8%
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 Population Density  Unlock2,630.393.4
 Land Area42.3  Unlock3,531,905.4
 Water Area  Unlock0.1264,836.8
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 Est. Total Population By Age
 Decatur, ILBillings, MTUnited States
 Age 0 to 46.0%  Unlock5.9%
 Age 5 to 9  Unlock6.3%6.1%
 Age 10 to 145.7%  Unlock6.6%
 Age 15 to 17  Unlock3.8%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  Unlock13.2%12.9%
 Age 45 to 5410.8%  Unlock12.6%
 Age 55 to 59  Unlock5.7%6.7%
 Age 60 to 646.8%  Unlock6.3%
 Age 65 to 74  Unlock10.0%9.6%
 Age 75 to 845.7%  Unlock4.5%
 Age 85 and over  Unlock2.4%1.9%
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 Race
 Decatur, ILBillings, MTUnited States
 White67.5%  Unlock59.4%
 Black  Unlock0.5%12.2%
 Asian1.4%  Unlock5.6%
 Native American  Unlock4.2%0.6%
 Hawaiian, Pacific Islander0.1%  Unlock0.2%
 Other  Unlock0.2%0.4%
 Two or More Races4.9%  Unlock3.2%
 Hispanic  Unlock6.9%18.4%
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 Marriage & Family
 Decatur, ILBillings, MTUnited States
 Married Population42.5%  Unlock49.8%
     Currently Married  Unlock47.5%48.0%
 Married but Separated1.4%  Unlock1.8%
 Single Population  Unlock51.7%50.2%
 Never Married35.7%  Unlock33.8%
 Divorced  Unlock14.7%10.8%
 Widowed7.8%  Unlock5.6%
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 Household Size  Unlock2.332.60
 Households30,718  Unlock124,010,992
 Family Households  Unlock28,24980,755,759
     Married couple, w/children20.5%  Unlock30.5%
     Married couple, no children  Unlock43.8%42.9%
 Non Family Households14,383  Unlock43,255,233
     Single householder, w/children  Unlock17.1%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 15 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 Billings    25 Reviews

Over 3 years ago

I would give this place four stars, but decided to give it five because it’s been so underrated. The five stars is contingent upon the city following through with its  More

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Over 3 years ago

A few people make a living in Billings, most people only make an existents. As for the crime rate, it depends on your point of view. If you compare Billings crime rate  More

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Over 5 years ago

If you enjoy sub zero temperatures in Winter and 100 plus degrees in the Summer. You will love Billings. Snow plowing is almost non existent, so good luck driving for 5  More

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