Jeroen Fischer (born 12 February 1966) is a retired Belgian sprinter and long jumper.

As a long jumper he finished eleventh at the 1987 European Indoor Championships,^[1] His personal best jump was 8.01 metres, achieved in July 1987 in Brussels.^[2] He then took his only Belgian championship title.^[3]

As a sprinter he competed at the 1986 European Championships^[4] and the 1991 World Indoor Championships without reaching the final.^[5] At the 1991 Summer Universiade he finished seventh in the 200 metres and won a bronze medal in the 4 × 100 metres relay.

He became Belgian 200 metres champion in 1986, 1987 and 1991; and 400 metres champion in 1988, 1989 and 1990.^[3] His personal best times were 10.44 seconds in the 100 metres, achieved in May 1988 in Nivelles; 20.84 seconds in the 200 metres, achieved in May 1988 in Nivelles; and 46.24 seconds in the 400 metres, achieved in September 1988 in Brussels.^[2]