Rivière-Saint-Jean (French pronunciation: [ʁivjɛʁ sɛ̃ ʒɑ̃], "St. John River") is an unorganized territory in the Gaspésie–Îles-de-la-Madeleine region of Quebec, Canada.

It is bisected by Quebec Route 198 that runs along the banks of the York River.

Portions of the river are protected in the Rivière-Saint-Jean Wildlife Reserve.

[4] The only locality in the territory is Grand-Étang,[5] located along Route 132 at the namesake Grand Étang (French for "Great Pond").

[6] Media related to Rivière-Saint-Jean, Gaspésie–Îles-de-la-Madeleine, Quebec at Wikimedia Commons