| Charles Duncan Drain | |
| Birth Date: | 24 January 1913 |
| Birth Place: | San Francisco, California[1] |
| Office: | Member of the Legislative Assembly of Alberta |
| Constituency: | Pincher Creek-Crowsnest |
| Term Start: | 1967 |
| Term End: | 1975 |
| Predecessor: | Garth Turcott |
| Successor: | Frederick Bradley |
| Party: | Social Credit |
Charles Duncan Drain (January 24, 1913 – January 27, 1991) was a politician from Alberta, Canada. He served in the Legislative Assembly of Alberta from 1967 to 1975 as a member of the Social Credit caucus in both government and opposition.
Drain first ran for a seat to the Alberta Legislature in the 1967 general election. He defeated incumbent MLA Garth Turcott to pick up the Pincher Creek-Crowsnest electoral district for the governing Social Credit party.[2] In the 1971 general election he defeated two other candidates.[3] In the 1975 general election his share of the popular vote fell sharply and he was defeated by Progressive Conservative candidate Fred Bradley.[4]
Charles married Mary Michalski and together they had four children, Douglas, Clair, Edmund, and James.[5] Edmund passed away in 2021.[6]