Joseph Raymond Fournier Préfontaine, PC QC (French pronunciation: [ʒozɛf ʁɛmɔ̃ fuʁnje pʁefɔ̃tɛn]; 16 September 1850 – 25 December 1905) was a Canadian politician.

Born in Longueuil, Quebec, he studied at the law faculty of McGill College, articled with Antoine-Aimé Dorion and Christophe-Alphonse Geoffrion, and was called to the bar in 1873.

When Joseph-Israel Tarte resigned from the Cabinet as Minister of Public Works in October 1902, Wilfrid Laurier, under pressure from Montréalers, gave Préfontaine the portfolio of Marine and Fisheries and, for the same reason, transferred to it from public works as "the major services relating to navigation."

He approved experiments in winter navigation and a program for installing illuminated buoys in the channel of the St Lawrence.

The French government held his funeral in the Église de La Madeleine in central Paris.