| Pierre-Auguste Lafleur | |
| Office: | Member of the Legislative Assembly of Quebec for Montréal-Verdun |
| Predecessor: | District created in 1922 |
| Successor: | Joseph-Jean-Léopold Comeau |
| Term Start: | 1923 |
| Term End: | 1939 |
| Birth Date: | 3 March 1872 |
| Birth Place: | Sainte-Adèle, Quebec |
| Death Place: | Verdun, Quebec |
| Party: | Union Nationale |
Pierre-Auguste Lafleur (March 3, 1872 - December 14, 1954) was a Canadian politician and a five-term Member of the Legislative Assembly of Quebec.
He was born in Sainte-Adèle, Laurentides on March 3, 1872, and made career in the furniture industry. He married Jennie Veitch in Verdun, Quebec, in 1918.
He served as a city councillor from 1921 to 1933 in Verdun.
Lafleur ran as a Conservative candidate in the provincial district of Montréal-Verdun in the 1923 election and won. He was re-elected in the 1927, 1931 and 1935 elections.
He joined Maurice Duplessis's Union Nationale and was re-elected in the 1936 election.
He was defeated in the 1939, 1944 and 1948 elections.
He died on December 14, 1954, in Verdun.