2025 Compare Cities People:
Jefferson City, MT vs Boulder, MT

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Highlights
- Boulder is 0% more densely populated than Jefferson City.
- People are 30.0% less likely to be married in Boulder.
- The Median Age is 7.7 years younger in Boulder.
 Jefferson City, MTBoulder, MTUnited States
 Population  Unlock1,033329,725,481
 Female Population47.5%  Unlock50.5%
 Male Population52.5%  Unlock49.5%
 Median Age  Unlock40.238.4
 space3
 Population - 2010373  Unlock309,327,143
 Population - 2000  Unlock1,300285,036,114
 Population - 1990288  Unlock251,960,433
 Pop. 2000 to Now  Unlock-0.7%15.6%
 Pop. 1990 to Now142.4%  Unlock30.8%
 space4
 Population Density  Unlock919.093.4
 Land Area23.2  Unlock3,531,905.4
 Water Area  Unlock0.0264,836.8
 space
 Est. Total Population By Age
 Jefferson City, MTBoulder, MTUnited States
 Age 0 to 45.0%  Unlock5.9%
 Age 5 to 9  Unlock10.0%6.1%
 Age 10 to 145.0%  Unlock6.6%
 Age 15 to 17  Unlock1.6%3.9%
 Age 18 to 200.0%  Unlock4.0%
 Age 21 to 24  Unlock8.2%5.2%
 Age 25 to 3416.9%  Unlock13.8%
 Age 35 to 44  Unlock15.5%12.9%
 Age 45 to 5415.5%  Unlock12.6%
 Age 55 to 59  Unlock6.8%6.7%
 Age 60 to 647.1%  Unlock6.3%
 Age 65 to 74  Unlock7.4%9.6%
 Age 75 to 844.6%  Unlock4.5%
 Age 85 and over  Unlock1.8%1.9%
 space1
 Race
 Jefferson City, MTBoulder, MTUnited States
 White93.8%  Unlock59.4%
 Black  Unlock0.0%12.2%
 Asian0.0%  Unlock5.6%
 Native American  Unlock5.3%0.6%
 Hawaiian, Pacific Islander0.0%  Unlock0.2%
 Other  Unlock0.0%0.4%
 Two or More Races4.8%  Unlock3.2%
 Hispanic  Unlock2.8%18.4%
 space2
 Marriage & Family
 Jefferson City, MTBoulder, MTUnited States
 Married Population57.6%  Unlock49.8%
     Currently Married  Unlock36.6%48.0%
 Married but Separated0.0%  Unlock1.8%
 Single Population  Unlock59.7%50.2%
 Never Married10.6%  Unlock33.8%
 Divorced  Unlock21.6%10.8%
 Widowed7.6%  Unlock5.6%
 space5
 Household Size  Unlock2.442.60
 Households180  Unlock124,010,992
 Family Households  Unlock20380,755,759
     Married couple, w/children30.1%  Unlock30.5%
     Married couple, no children  Unlock36.9%42.9%
 Non Family Households87  Unlock43,255,233
     Single householder, w/children  Unlock21.7%15.8%
     Single householder, no children5.4%  Unlock10.8%
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