Joop Demmenie (19 Zvita 1918 <unk> 3 Chikumi 1991) aive mutyairi webhasikoro kubva kuNetherlands. Mushure mokunge apedza wechina mumakwikwi emugwagwa weamateur pa1937 UCI Road World Championships, akahwina menduru yebronze pa1938 UCI Road World Championships
munhangemutange yomumugwagwa yevanhurume. Akanga ari mutyairi webhasikoro pakati pa1939 na1948. Muna 1939 akakunda muBrussels-Hozémont.