<page_title> Harmony Township, Forest County, Pennsylvania </page_title> <table> <cell> 2000 <col_header> Historical population </col_header> <col_header> Census </col_header> </cell> <cell> 511 <col_header> Historical population </col_header> <col_header> Pop. </col_header> </cell> <cell> 2010 <col_header> Historical population </col_header> <col_header> Census </col_header> </cell> <cell> 666 <col_header> Historical population </col_header> <col_header> Pop. </col_header> </cell> </table>
The population of Harmony Township was 666 at the 2010 census, up from 511 at the 2000 census.