| John Alexander Calder | |
| Parliament: | Ontario Provincial |
| Term Start: | September 23, 1918 |
| Term End: | July 22, 1921 |
| Predecessor: | Newton Rowell |
| Successor: | David Munroe Ross |
| Riding: | Oxford North |
| Party: | Liberal |
John Alexander Calder was a Canadian politician from Ontario. He represented Oxford North in the Legislative Assembly of Ontario from a 1918 by-election to his resignation in 1921.[1]