Jean-Marie-Raphaël Le Jeune (born Jean-Marie; 12 April 1855 – 21 November 1930) was a French Canadian Roman Catholic priest, Oblate of Mary Immaculate, missionary, linguist, author, and newspaper publisher.

Le Jeune and another young missionary, Father Eugène-Casimir Chirouse, travelled to North America in the company of Bishop Paul Durieu, who on the voyage across the Atlantic instructed them in the basic vocabulary of Chinook Jargon, a pidgin trade language in use in the Pacific Northwest composed of Chinookan, Nootkan, French, and English.

The following June he was sent to the Fraser Canyon area to begin his missionary work among the Indians and minister to the Catholics who were among the thousands of workmen then employed in the construction of the Canadian Pacific Railway.

[2] In the fall of 1880, Le Jeune was sent to St. Mary's Mission, which had been established by the Oblates in 1861 as the centre for missionary activity among the Indians of the Lower Fraser Valley, where he spent the next two years.

The latter report noted that the party had brought back 2000 medals blessed by the Pope for distribution to the Indians, as well as 150 stereopticon views which Le Jeune had exhibited to a large crowd at the hall on the Kamloops Reserve.