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2026 Compare Cities People:
Potomac, IL vs Bismarck, IL

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Highlights
- Bismarck is 0% more densely populated than Potomac.
- People are 14.4% more likely to be married in Bismarck.
- The Median Age is 5.1 years older in Bismarck.
 Potomac, ILBismarck, ILUnited States
 Population  Unlock555329,725,481
 Female Population51.0%  Unlock50.5%
 Male Population49.0%  Unlock49.5%
 Median Age  Unlock36.638.4
 space3
 Population - 2010751  Unlock309,327,143
 Population - 2000  Unlock542285,036,114
 Population - 1990753  Unlock251,960,433
 Pop. 2000 to Now  Unlock-3.3%15.6%
 Pop. 1990 to Now-9.6%  Unlock30.8%
 space4
 Population Density  Unlock747.093.4
 Land Area0.5  Unlock3,531,905.4
 Water Area  Unlock0.0264,836.8
 space
 Est. Total Population By Age
 Potomac, ILBismarck, ILUnited States
 Age 0 to 410.0%  Unlock5.9%
 Age 5 to 9  Unlock8.8%6.1%
 Age 10 to 149.1%  Unlock6.6%
 Age 15 to 17  Unlock4.7%3.9%
 Age 18 to 202.7%  Unlock4.0%
 Age 21 to 24  Unlock3.6%5.2%
 Age 25 to 3413.7%  Unlock13.8%
 Age 35 to 44  Unlock10.8%12.9%
 Age 45 to 5412.1%  Unlock12.6%
 Age 55 to 59  Unlock8.3%6.7%
 Age 60 to 643.9%  Unlock6.3%
 Age 65 to 74  Unlock7.2%9.6%
 Age 75 to 842.7%  Unlock4.5%
 Age 85 and over  Unlock2.5%1.9%
 space1
 Race
 Potomac, ILBismarck, ILUnited States
 White81.5%  Unlock59.4%
 Black  Unlock0.0%12.2%
 Asian6.9%  Unlock5.6%
 Native American  Unlock0.0%0.6%
 Hawaiian, Pacific Islander0.0%  Unlock0.2%
 Other  Unlock0.0%0.4%
 Two or More Races3.0%  Unlock3.2%
 Hispanic  Unlock1.3%18.4%
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 Marriage & Family
 Potomac, ILBismarck, ILUnited States
 Married Population52.3%  Unlock49.8%
     Currently Married  Unlock59.8%48.0%
 Married but Separated1.8%  Unlock1.8%
 Single Population  Unlock40.2%50.2%
 Never Married28.2%  Unlock33.8%
 Divorced  Unlock10.1%10.8%
 Widowed8.3%  Unlock5.6%
 space5
 Household Size  Unlock2.832.60
 Households286  Unlock124,010,992
 Family Households  Unlock15480,755,759
     Married couple, w/children33.2%  Unlock30.5%
     Married couple, no children  Unlock41.6%42.9%
 Non Family Households102  Unlock43,255,233
     Single householder, w/children  Unlock16.9%15.8%
     Single householder, no children6.5%  Unlock10.8%
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Learn More About Potomac, Illinois
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Learn More About Bismarck, Illinois
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