John Plummer Marcellus (born: 1838 Morrisburg, Ontario - died: 1932 Pincher Creek) was a politician and rancher from Alberta, Canada.
Marcellus married his wife Maria Barkley in 1871 at Dunbar, Ontario.
Marcellus ran for the Alberta legislature in the 1905 Alberta general election. He won a hotly contested 3 way race in the Pincher Creek electoral district in rural southeast Alberta. He served one term as a backbencher in the Legislative Assembly before retiring in 1909.
| Legislative Assembly of Alberta | ||
|---|---|---|
| Preceded by New District |
MLA Pincher Creek 1905-1909 |
Succeeded by David Warnock |