<page_title> Oberaargau </page_title> <section_title> Administrative district </section_title> <table> <cell> 81,326 <col_header> Population (31 December 2017) </col_header> </cell> <cell> 331.04 <col_header> Area in km² </col_header> </cell> </table>
Oberaargau has an area of of 331.04 km² with 81,326 residents as of 31 December 2017.