Marion County: Population
Note: 2015 estimates were revised per the Census Bureau's updates when the 2016 data were released.
Source: 1970 & 1980: U.S. Bureau of the Census, County Population Census Counts, (http://www.census.gov/population/www/censusdata/cencounts.html);
2001-2009, 2011-2016: U.S. Bureau of the Census, Population Estimates Program, (http://www.census.gov/popest/);
1990, 2000, 2010: U.S. Bureau of the Census, American Factfinder, (http://factfinder2.census.gov/); DATE LAST UPDATED: April 25, 2017.