| Jack Harper | |
| Birth Date: | 1927 |
| Birth Place: | Hamilton, Ontario, Canada |
| Death Place: | Hamilton, Ontario, Canada |
| Position1: | Halfback |
| Playing Years1: | 1948 |
| Playing Team1: | Hamilton Tigers |
| Playing Years2: | 1949–52 |
| Playing Team2: | Montreal Alouettes |
| Playing Years3: | 1953–54 |
| Playing Team3: | Saskatchewan Roughriders |
| Playing Years4: | 1955 |
| Playing Team4: | Toronto Argonauts |
| Cflallstar: | 1948 |
| Honors: | - Grey Cup Champion |
John Louis Harper (1927 – August 18, 2003) was a Grey Cup champion and All-Star Canadian Football League player. He was a halfback.
Harper started out with the Hamilton Tigers of the Ontario Rugby Football Union and had an All-Star season in 1948, leading his union in scoring with 60 points and tying Virgil Wagner for the national title. The Montreal Alouettes signed him, and fellow All-Star quarterback Frank Filchock, away from Hamilton in 1949[1] and these two stars were at the heart of the Als first ever Grey Cup victory that season.[2] After 3 more seasons in Montreal, Harper played with the Saskatchewan Roughriders for two seasons, and finished his career with 6 games for the Toronto Argonauts in 1955. He died in 2003.[3] [4]