Eva Johanne Arndt (later Riise, 27 November 1919 – 18 June 1993) was a Danish backstroke and freestyle swimmer who competed in the 1936 Summer Olympics and in the 1948 Summer Olympics. She was born in Aarhus and died in , Rougsø Municipality. In 1936 she was a member of the Danish relay team which finished seventh in the 4×100-metre freestyle relay event. In the 100-metre freestyle competition she was eliminated in the first round. Twelve years later she won the silver medal with the Danish relay team in the 4×100-metre freestyle relay event.