<page_title> Sullivan County, Indiana </page_title> <section_title> Demographics </section_title> <table> <cell> 2010 <col_header> Historical population </col_header> <col_header> Census </col_header> </cell> <cell> 21,475 <col_header> Historical population </col_header> <col_header> Pop. </col_header> </cell> </table>
As of 2010, the population was 21,475.