<page_title> Mercer, Missouri </page_title> <section_title> Demographics </section_title> <table> <cell> 2000 <col_header> Historical population </col_header> <col_header> Census </col_header> </cell> <cell> 342 <col_header> Historical population </col_header> <col_header> Pop. </col_header> </cell> </table>
As of the census of 2000, there were 342 people residing in Mercer.