<page_title> St. Clair Township, Westmoreland County, Pennsylvania </page_title> <section_title> Demographics </section_title> <table> <cell> 2000 <col_header> Historical population </col_header> <col_header> Census </col_header> </cell> <cell> 1,398 <col_header> Historical population </col_header> <col_header> Pop. </col_header> </cell> </table>
The population in St. Clair Township was 1,398 at the 2000 census.