François Jacques Florentin Lafortune (born 10 January 1896, date of death unknown) was a Belgian rifle shooter who competed at five Olympic Games (1924, 1936, 1948, 1952, 1960).
He was born in Leuven.
He was part of a shooting family with sixteen Olympic appearances between them.
His last two Olympic appearances were made with his son, seven-time-Olympian Frans Lafortune.
His last Olympic appearance was also made with his younger brother, four-time Olympian Marcel Lafortune.
His older brother Hubert Lafortune was part of the Belgian gymnastics team that won silver at the 1920 Olympic Games.