Ludo Dielis (born 23 February 1945) is a Belgian professional carom billiards player.
When Raymond Ceulemans, the reigning champion, opted not to participate in the world championship in 1981 over some circumstances, Dielis was selected as a temporary replacement. Rising to the occasion, he won the title besting Nobuaki Kobayashi. He won the title again in 1989 against Torbjörn Blomdahl.