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2025 Compare Cities People:
Belfast, ME vs Sidney, ME

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Highlights
- Sidney is 0% more densely populated than Belfast.
- People are 6.3% more likely to be married in Sidney.
- The Median Age is 22.3 years younger in Sidney.
 Belfast, MESidney, MEUnited States
 Population  Unlock4,615329,725,481
 Female Population56.0%  Unlock50.5%
 Male Population44.0%  Unlock49.5%
 Median Age  Unlock37.838.4
 space3
 Population - 20106,670  Unlock309,327,143
 Population - 2000  Unlock3,514285,036,114
 Population - 19906,355  Unlock251,960,433
 Pop. 2000 to Now  Unlock29.3%15.6%
 Pop. 1990 to Now5.6%  Unlock30.8%
 space4
 Population Density  Unlock109.293.4
 Land Area34.0  Unlock3,531,905.4
 Water Area  Unlock3.3264,836.8
 space
 Est. Total Population By Age
 Belfast, MESidney, MEUnited States
 Age 0 to 43.4%  Unlock5.9%
 Age 5 to 9  Unlock5.0%6.1%
 Age 10 to 145.8%  Unlock6.6%
 Age 15 to 17  Unlock3.2%3.9%
 Age 18 to 202.1%  Unlock4.0%
 Age 21 to 24  Unlock4.9%5.2%
 Age 25 to 349.7%  Unlock13.8%
 Age 35 to 44  Unlock14.5%12.9%
 Age 45 to 548.1%  Unlock12.6%
 Age 55 to 59  Unlock10.0%6.7%
 Age 60 to 6414.7%  Unlock6.3%
 Age 65 to 74  Unlock12.0%9.6%
 Age 75 to 848.7%  Unlock4.5%
 Age 85 and over  Unlock0.0%1.9%
 space1
 Race
 Belfast, MESidney, MEUnited States
 White91.0%  Unlock59.4%
 Black  Unlock0.0%12.2%
 Asian0.4%  Unlock5.6%
 Native American  Unlock0.0%0.6%
 Hawaiian, Pacific Islander0.0%  Unlock0.2%
 Other  Unlock0.0%0.4%
 Two or More Races3.6%  Unlock3.2%
 Hispanic  Unlock1.0%18.4%
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 Marriage & Family
 Belfast, MESidney, MEUnited States
 Married Population54.1%  Unlock49.8%
     Currently Married  Unlock57.5%48.0%
 Married but Separated0.5%  Unlock1.8%
 Single Population  Unlock42.5%50.2%
 Never Married22.9%  Unlock33.8%
 Divorced  Unlock15.8%10.8%
 Widowed6.4%  Unlock5.6%
 space5
 Household Size  Unlock2.442.60
 Households3,327  Unlock124,010,992
 Family Households  Unlock1,48080,755,759
     Married couple, w/children13.7%  Unlock30.5%
     Married couple, no children  Unlock50.5%42.9%
 Non Family Households1,253  Unlock43,255,233
     Single householder, w/children  Unlock20.9%15.8%
     Single householder, no children7.8%  Unlock10.8%
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Learn More About Belfast, Maine
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Learn More About Sidney, Maine
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