Kathleen Smet (born 19 January 1970, in Beveren) is a Belgian former triathlete, becoming European champion in 2000 and 2002.

She competed in Olympic and Long Distance Triathlons.

She took sixteenth place with a total time of 2:04:05.98.

In 2005, Smet won the gold medal at the World Championships and retired from the sport.

[1] This biographical article related to a Belgian athlete known for competing in triathlons is a stub.