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Marion County, Indiana

Largest City: Indianapolis (2014 population: 858,325)

Population per Square Mile: 2,357.41

Square Miles: 396.30

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How many people live here?NumberRank in StatePercent of StateIndiana
Today 2014934,243114.2%6,596,855
Census 2010903,393113.9%6,483,797
Tomorrow (2020 projection)*951,780113.9%6,852,121
Percent Change 2010 to Today3.4%10 1.7%

*Projection based on 2010 Census counts.
Sources: U.S. Census Bureau; Indiana Business Research Center

How does our population grow? 2013-2014NumberRank in StatePercent of StateIndiana
Net Domestic Migration (from other counties in Indiana or states in the U.S.)-3,74692 -7,849
Net International Migration (directly from other countries)2,9191 10,472
Natural Increase (births minus deaths)6,948127.8%24,994

Source: U.S. Census Bureau

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How young or old is our population? 2014NumberRank in StatePct Dist.
in County
Pct Dist.
in State
Preschool (0 to 4)70,54417.6%6.4%
School Age (5 to 17)162,452117.4%17.6%
College Age (18 to 24)91,36619.8%10.1%
Young Adult (25 to 44)273,704129.3%25.3%
Older Adult (45 to 64)230,734124.7%26.3%
Seniors (65 and older)105,443111.3%14.3%
Median Age34.3  Median Age = 37.5
Under 18232,996124.9%24.0%