Rimvydas Šalčius (born January 30, 1985) is a Lithuanian former swimmer, who specialized in butterfly events. He is a multiple-time Lithuanian champion, and a two-time national record holder in both the men's butterfly and medley relay events. He also set a junior record time of 53.25 seconds by winning the gold medal in the men's 100 m butterfly at the 2003 European Championships in Glasgow, Scotland.