<page_title> Otter Tail County, Minnesota </page_title> <section_title> Demographics </section_title> <table> <cell> 2000 <col_header> Historical population </col_header> <col_header> Census </col_header> </cell> <cell> 57,159 <col_header> Historical population </col_header> <col_header> Pop. </col_header> </cell> <cell> US Decennial Census 1790-1960 1900-1990 1990-2000 2010-2018 <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 57,159 people in the Otter Tail County.