| H.-G. Grenier's Election Results | ||||
| Date of election | Party or label | Riding | # of votes | % of popular vote |
| 11 June 1945 election | Independent | Three Rivers | 423 | 2.0% |
| 27 June 1949 election | Independent | Trois-Rivières | 432 | 1.7% |
| 10 June 1957 election | Capital familial | Trois-Rivières | 237 | 0.8% |
| 31 March 1958 election | Capital familial | Trois-Rivières | 986 | 3.3% |
| 1961 (by-election) | Capital familial | Chambly | 223 | 0,01% |
| 8 June 1962 election | Capital familial | Saint-Denis | 393 | 1.6% |
| 10 February 1964 (by-election) | Parti humain familial | Saint-Denis | 68 | 0.4% |
| 29 May 1965 (by-election) | Esprit social | Outremont—Saint-Jean | 214 | 1.9% |
| 8 November 1965 election | Droit vital personnel | Outremont—Saint-Jean | 465 | 2.3% |
| 19 September 1966 (by-election) | unknown | Nicolet—Yamaska | 44 | 0.3% |
| 25 June 1968 election | Esprit social | St.-Jacques | 311 | 1.9% |
| 31 May 1971 (by-election) | Esprit social | Trois-Rivières | 422 | 1.6% |
| 30 October 1972 election | unknown | Outremont | 109 | 0.3% |
| 18 February 1980 election | Independent | Outremont | 140 | 0.4% |