Johanna "Jopie" Katarina Selbach (27 July 1918 <unk> 30 April 1998) was a freestyle swimmer from the Netherlands. <unk> <unk> <unk>
1934 European Aquatics Championships (with Willy den Ouden, Rie Mastenbroek and Ans Timmermans) and 1936 Summer Olympics (with den Ouden, Mastenbroek and Tini Wagner) in the women's 4 × 100 m freestyle relay.<unk>1934 European Aquatics Championships (with Willy den Ouden, Rie Mastenbroek and Ans Timmermans) and 1936 Summer Olympics (with den Ouden, Mastenbroek and Tini Wagner) in the women's 4 × 100 m freestyle relay.