<page_title> Will County, Illinois </page_title> <section_title> Demographics </section_title> <table> <cell> 2000 <col_header> Historical population </col_header> <col_header> Census </col_header> </cell> <cell> 502,266 <col_header> Historical population </col_header> <col_header> Pop. </col_header> </cell> <cell> 2010 <col_header> Historical population </col_header> <col_header> Census </col_header> </cell> <cell> 677,560 <col_header> Historical population </col_header> <col_header> Pop. </col_header> </cell> <cell> 34.9% <col_header> Historical population </col_header> <col_header> %± </col_header> </cell> </table>
According to the 2010 Census, Will County, Illinois had a population of 677,560, which is an increase of 34.9%, from 502,266 in 2000.