| Arthur Jules Marion | |
| Birth Date: | November 19, 1884 |
| Birth Place: | Duck Lake, North-West Territories |
| Death Date: | April 5, 1941 (aged 56) |
| Death Place: | Meadow Lake, Saskatchewan |
| Spouse: | Victorine Boucher |
| Residence: | Meadow Lake, Saskatchewan |
| Nationality: | Métis |
| Office: | MLA for Athabasca and Île-à-la-Crosse |
| Term Start: | 1926 |
| Term End: | 1941 |
| Predecessor: | Deakin Alexander Hall |
| Successor: | Hubert Staines |
| Occupation: | Politician, businessman |
Arthur Jules Marion (November 19, 1884 - April 5, 1941) was a Métis politician and businessman. He was first elected as a Liberal MLA in the district of Île-à-la-Crosse in a by-election held in April 1926 after incumbent Joseph Octave Nolin died in office in December 1925. Marion would later be re-elected in the then-recently redrawn district of Athabasca in 1938. Notably, he had been earlier defeated in 1934 by Deakin Alexander Hall, who was also running Liberal.In July 1941, a by-election was held to fill to the seat left vacant by Marion's own death in office in April 1941. Liberal Hubert Staines was elected to replace him.[1] Marion's son Louis Marcien Marion successfully ran in the next Saskatchewan general election, and served as MLA in Athabasca from 1944 to 1952.
Marion was the brother-in-law of federal Liberal Senator William Albert Boucher.[2]