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

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Highlights
- Waterloo is 0% more densely populated than Lake St. Louis.
- People are 10.7% less likely to be married in Waterloo.
- The Median Age is 3.5 years younger in Waterloo.
 Lake St. Louis, MOWaterloo, ILUnited States
 Population  Unlock10,906329,725,481
 Female Population49.2%  Unlock50.5%
 Male Population50.8%  Unlock49.5%
 Median Age  Unlock40.438.4
 space3
 Population - 201014,607  Unlock309,327,143
 Population - 2000  Unlock7,614285,036,114
 Population - 19908,355  Unlock251,960,433
 Pop. 2000 to Now  Unlock38.4%15.6%
 Pop. 1990 to Now105.7%  Unlock30.8%
 space4
 Population Density  Unlock1,340.393.4
 Land Area8.3  Unlock3,531,905.4
 Water Area  Unlock0.1264,836.8
 space
 Est. Total Population By Age
 Lake St. Louis, MOWaterloo, ILUnited States
 Age 0 to 43.4%  Unlock5.9%
 Age 5 to 9  Unlock6.1%6.1%
 Age 10 to 145.0%  Unlock6.6%
 Age 15 to 17  Unlock1.8%3.9%
 Age 18 to 202.6%  Unlock4.0%
 Age 21 to 24  Unlock4.9%5.2%
 Age 25 to 348.6%  Unlock13.8%
 Age 35 to 44  Unlock15.1%12.9%
 Age 45 to 5413.3%  Unlock12.6%
 Age 55 to 59  Unlock6.2%6.7%
 Age 60 to 648.2%  Unlock6.3%
 Age 65 to 74  Unlock11.4%9.6%
 Age 75 to 847.1%  Unlock4.5%
 Age 85 and over  Unlock3.7%1.9%
 space1
 Race
 Lake St. Louis, MOWaterloo, ILUnited States
 White86.6%  Unlock59.4%
 Black  Unlock0.5%12.2%
 Asian1.3%  Unlock5.6%
 Native American  Unlock0.5%0.6%
 Hawaiian, Pacific Islander0.0%  Unlock0.2%
 Other  Unlock0.0%0.4%
 Two or More Races3.5%  Unlock3.2%
 Hispanic  Unlock1.5%18.4%
 space2
 Marriage & Family
 Lake St. Louis, MOWaterloo, ILUnited States
 Married Population63.1%  Unlock49.8%
     Currently Married  Unlock55.7%48.0%
 Married but Separated0.3%  Unlock1.8%
 Single Population  Unlock43.6%50.2%
 Never Married22.6%  Unlock33.8%
 Divorced  Unlock13.4%10.8%
 Widowed4.0%  Unlock5.6%
 space5
 Household Size  Unlock2.472.60
 Households6,747  Unlock124,010,992
 Family Households  Unlock3,06880,755,759
     Married couple, w/children34.6%  Unlock30.5%
     Married couple, no children  Unlock48.0%42.9%
 Non Family Households1,869  Unlock43,255,233
     Single householder, w/children  Unlock13.4%15.8%
     Single householder, no children3.0%  Unlock10.8%
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Learn More About Lake St. Louis, Missouri
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