<page_title> By-elections to the 42nd Canadian Parliament </page_title> <section_title> Overview </section_title> <table> <cell> April 3, 2017 <col_header> Date </col_header> </cell> <cell> April 3, 2017 <col_header> Date </col_header> </cell> <cell> April 3, 2017 <col_header> Date </col_header> </cell> <cell> April 3, 2017 <col_header> Date </col_header> </cell> <cell> Ottawa—Vanier <col_header> By-election </col_header> </cell> <cell> April 3, 2017 <col_header> Date </col_header> </cell> <cell> Mauril Bélanger <col_header> Incumbent </col_header> </cell> <cell> Liberal <col_header> Party </col_header> </cell> <cell> Death (amyotrophic lateral sclerosis) <col_header> Cause </col_header> </cell> </table>
Five by-elections were held on April 3, 2017, including one following the death of Mauril Bélanger (Liberal, Ottawa—Vanier).