| Honorific-Prefix: | The Hon. |
| Arthur Julien Tremblay | |
| Office: | Senator for The Laurentides |
| Appointed: | Joe Clark |
| Predecessor: | Maurice Bourget |
| Successor: | Raymond Setlakwe |
| Term Start: | 1979 |
| Term End: | 1992 |
| Birth Date: | 18 June 1917 |
| Birth Place: | St-Bruno, Quebec |
| Party: | Progressive Conservative |
| Committees: | Chair, Standing Committee on Social Affairs, Science and Technology (1984–1988) |
Arthur Julien Tremblay, (June 18, 1917 – October 27, 1996) was a Canadian politician.
Born in St-Bruno, Lac Saint-Jean, Quebec, he received a Master of Arts degree in 1942 from Université Laval and a Master of Education degree in 1945 from Harvard University.
In 1979, he was appointed by Joe Clark to the Senate representing the senatorial division of The Laurentides, Quebec. A Progressive Conservative, he retired on his 75th birthday in 1992.
In 1976, he was made an Officer of the Order of Canada for "his contribution to the public service". In 1991, he was made an Officer of the National Order of Quebec.