Ilse Heylen (born 21 March 1977, Edegem) is a Belgian judoka.

She won the bronze medal at the 2004 Summer Olympics in Athens, Greece.

[1] At the 2004 Summer Olympics in Athens, Heylen competed in the Half-lightweight (52 kg).

She won her first two bouts against Madagascar's Naina Ravaoarisoa and Kazakhstan's Sholpan Kaliyeva before losing to Cuba's Amarilis Savón, the eventual bronze medal winner, she advanced to the repechage however.

[8] At the 2012 Summer Olympics, she reached the semi-finals, where she was defeated by the eventual silver medalist, Yanet Bermoy.