| Campbell Calder | |
| Office1: | Ontario MPP |
| Term Start1: | 1948 |
| Term End1: | 1951 |
| Predecessor1: | William Gourlay Webster |
| Successor1: | John Robarts |
| Constituency1: | London |
| Party: | Liberal |
| Birth Date: | 6 November 1910 |
| Birth Place: | London, Ontario, Canada |
| Death Place: | London, Ontario, Canada |
| Spouse: | Winifred Margaret Ferguson |
Campbell Carlyle Calder (November 6, 1910 – February 7, 1994) was a Canadian politician.[1] He was elected to the Legislative Assembly of Ontario as the Liberal Member of Provincial Parliament (MPP) for London, Ontario in 1948. In 1950, he was a candidate in the Ontario Liberal leadership convention, placing fourth. He served only one term in the legislature leaving in 1951 when he was defeated by Progressive Conservative John Robarts.
He died at the University Hospital in London in 1994.[2]