| Glenville L. MacLachlan | |
| Birth Date: | 4 June 1895 |
| Death Place: | Calgary, Alberta |
| Birth Place: | Watford, Ontario |
| Office: | Member of the Legislative Assembly of Alberta |
| Constituency: | Coronation |
| Term Start: | 1935 |
| Term End: | 1940 |
| Predecessor: | George N. Johnston |
| Successor: | District abolished |
| Party: | Social Credit |
Glenville Lawrence MacLachlan (June 4, 1895 - January 28, 1973) was a provincial politician from Alberta, Canada. He served as a member of the Legislative Assembly of Alberta from 1935 to 1940, sitting with the Social Credit caucus in government.[1] MacLachlan was one of the leaders of the 1937 Social Credit backbenchers' revolt and became chairman of the Social Credit Board, a body created as a result of the revolt, that had the purpose of overseeing the implementation of social credit economic theory in Alberta. In 1940, the Social Credit Association denied him the right to run as a party candidate in that year's election.[2]