| Birth Date: | 26 July 1878 |
| Birth Place: | Westville, Nova Scotia |
| Office: | Member of the Legislative Assembly of Alberta |
| Constituency: | Taber |
| Term Start: | June 19, 1930 |
| Term End: | August 22, 1935 |
| Predecessor: | Lawrence Peterson |
| Successor: | James Hansen |
| Party: | United Farmers |
| Office1: | Minister of Public Works |
| Term Start1: | July 14, 1934 |
| Term End1: | September 3, 1935 |
| Premier1: | Richard Reid |
| Predecessor1: | Richard Reid |
| Successor1: | William Fallow |
| Occupation: | politician |
John James MacLellan (July 26, 1878 – September 17, 1955)[1] was a provincial politician from Alberta, Canada. He served as a member of the Legislative Assembly of Alberta from 1930 to 1935 sitting with the United Farmers caucus in government. During his time in office he briefly served as a cabinet minister in the government of Premier Richard Reid from 1934 to 1935.
MacLellan ran for a seat to the Alberta Legislature in the 1930 Alberta general election as a United Farmers candidate in the electoral district of Taber. He won a closely contested two-way race over an independent candidate to hold the district for his party.[2]
MacLellan was promoted to the Executive Council of Alberta by Premier Richard Reid on July 14, 1934, to run the Public Works portfolio. He ran for re-election in the 1935 Alberta general election but was defeated finishing a distant second place out of three candidates losing to Social Credit candidate James Hansen.[3]