2025 Compare Cities People:
Onida, SD vs Marion, SD

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Highlights
- Marion is 0% more densely populated than Onida.
- People are 10.5% less likely to be married in Marion.
- The Median Age is 3.5 years younger in Marion.
 Onida, SDMarion, SDUnited States
 Population  Unlock897329,725,481
 Female Population46.2%  Unlock50.5%
 Male Population53.8%  Unlock49.5%
 Median Age  Unlock44.438.4
 space3
 Population - 2010663  Unlock309,327,143
 Population - 2000  Unlock892285,036,114
 Population - 1990761  Unlock251,960,433
 Pop. 2000 to Now  Unlock-13.0%15.6%
 Pop. 1990 to Now-17.5%  Unlock30.8%
 space4
 Population Density  Unlock1,033.493.4
 Land Area0.7  Unlock3,531,905.4
 Water Area  Unlock0.0264,836.8
 space
 Est. Total Population By Age
 Onida, SDMarion, SDUnited States
 Age 0 to 48.1%  Unlock5.9%
 Age 5 to 9  Unlock7.0%6.1%
 Age 10 to 147.4%  Unlock6.6%
 Age 15 to 17  Unlock4.3%3.9%
 Age 18 to 200.9%  Unlock4.0%
 Age 21 to 24  Unlock4.7%5.2%
 Age 25 to 3411.0%  Unlock13.8%
 Age 35 to 44  Unlock11.6%12.9%
 Age 45 to 5411.6%  Unlock12.6%
 Age 55 to 59  Unlock6.6%6.7%
 Age 60 to 6410.9%  Unlock6.3%
 Age 65 to 74  Unlock7.5%9.6%
 Age 75 to 8412.4%  Unlock4.5%
 Age 85 and over  Unlock8.5%1.9%
 space1
 Race
 Onida, SDMarion, SDUnited States
 White92.9%  Unlock59.4%
 Black  Unlock0.0%12.2%
 Asian0.0%  Unlock5.6%
 Native American  Unlock0.4%0.6%
 Hawaiian, Pacific Islander0.0%  Unlock0.2%
 Other  Unlock0.0%0.4%
 Two or More Races3.6%  Unlock3.2%
 Hispanic  Unlock0.7%18.4%
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 Marriage & Family
 Onida, SDMarion, SDUnited States
 Married Population56.6%  Unlock49.8%
     Currently Married  Unlock50.0%48.0%
 Married but Separated0.0%  Unlock1.8%
 Single Population  Unlock49.3%50.2%
 Never Married24.2%  Unlock33.8%
 Divorced  Unlock8.7%10.8%
 Widowed5.7%  Unlock5.6%
 space5
 Household Size  Unlock2.352.60
 Households258  Unlock124,010,992
 Family Households  Unlock21780,755,759
     Married couple, w/children19.7%  Unlock30.5%
     Married couple, no children  Unlock41.5%42.9%
 Non Family Households121  Unlock43,255,233
     Single householder, w/children  Unlock12.9%15.8%
     Single householder, no children1.5%  Unlock10.8%
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