<page_title> Sierra County, California </page_title> <section_title> 2010 </section_title> <table> <cell> 2010 <col_header> Historical population </col_header> <col_header> Census </col_header> </cell> <cell> 3,240 <col_header> Historical population </col_header> <col_header> Pop. </col_header> </cell> <cell> U.S. Decennial Census 1790-1960 1900-1990 1990-2000 2010-2015 <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>
The 2010 United States Census reported that Sierra County had a population of 3,240.