<page_title> Box Elder County, Utah </page_title> <section_title> Demographics </section_title> <table> <cell> 2000 <col_header> Historical population </col_header> <col_header> Census </col_header> </cell> <cell> 42,745 <col_header> Historical population </col_header> <col_header> Pop. </col_header> </cell> <cell> US Decennial Census 1790–1960 1900–1990 1990–2000 2010–2014 <col_header> Historical population </col_header> <col_header> Census </col_header> <col_header> Pop. </col_header> <col_header>  </col_header> <col_header> %± </col_header> </cell> </table>
As of the 2000 United States census, there were 42,745 people in Box Elder county.