<page_title> Dallas County, Iowa </page_title> <section_title> Demographics </section_title> <table> <cell> 2000 <col_header> Historical population </col_header> <col_header> Census </col_header> </cell> <cell> 40,750 <col_header> Historical population </col_header> <col_header> Pop. </col_header> </cell> </table>
As of the census of 2000, there were 40,750 people residing in Dallas County.