Steve Lemmens (September 8, 1972 – October 11, 2016) was a Belgian former professional snooker player who played on the main tour between 1991 and 1995.

Lemmens first burst onto the snooker scene in his home country when at the age of 16 he reached the finals of the Belgian Amateur Championship, a record that would not be beaten until 2010 by Luca Brecel.

Three years later in 1990 he won the Belgian Championship after defeating five-time champion Mario Lannoye 7–2 in the final, as a result Lemmens went on to represent Belgium in the 1990 World Amateur Championship where he reached the final eventually losing 11–8 to Irishman Stephen O'Connor.

By 1995, Lemmens had fallen further in the world rankings, and dropped off of the main tour at the end of the 1994–95 snooker season.

On 10 October 2016, at the age of 44, Lemmens died by suicide when he stood in front of a train at Wezemaal.