<page_title> Caernarvon Township, Lancaster 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> 4,278 <col_header> Historical population </col_header> <col_header> Pop. </col_header> </cell> </table>
The population of Caernarvon Township, Lancaster County, Pennsylvania, in 2000, was 4,278.