| Léopold Demers | |
| Birth Date: | 14 August 1912 |
| Birth Place: | Quebec City, Quebec, Canada |
| Death Place: | Laval, Quebec, Canada |
| Riding: | Laval—Two Mountains |
| Predecessor: | Joseph-Roméo-Liguori Lacombe |
| Successor: | riding merged |
| Term Start: | December 1948 |
| Term End: | June 1949 |
| Riding2: | Laval |
| Predecessor2: | riding created |
| Successor2: | Rodrigue Bourdages |
| Term Start2: | June 1949 |
| Term End2: | March 1958 |
| Profession: | agrologist |
| Party: | Liberal |
Léopold Demers (14 August 1912 – 21 November 1990) was a Liberal party member of the House of Commons of Canada. He was an agrologist by career.
He was first elected at the Laval—Two Mountains riding in a 20 December 1948 by-election. In the 1949 federal election, he was re-elected at Laval then re-elected for successive terms in 1953 and 1957. Demers was defeated in the 1958 election by Rodrigue Bourdages of the Progressive Conservative party.