# Grenville—Dundas (federal electoral district)

Grenville—Dundas was a federal electoral district represented in the House of Commons of Canada from 1925 to 1968. It was located in the province of Ontario. This riding was created in 1925 from parts of Dundas and Grenville ridings.
It consisted of the counties of Grenville and Dundas.
The electoral district was abolished in 1966 when it was redistributed between Grenville—Carleton and Stormont—Dundas ridings.

## Members of Parliament

This riding elected the following members of the House of Commons of Canada:
| Parliament | Years | Member | Party |
| Riding created from Dundas and Grenville |||||
| 15th | 1925–1926 | Arza Clair Casselman | Conservative |
| 16th | 1926–1930 | Arza Clair Casselman | Conservative |
| 17th | 1930–1935 | Arza Clair Casselman | Conservative |
| 18th | 1935–1940 | Arza Clair Casselman | Conservative |
| 19th | 1940–1945 | Arza Clair Casselman | National Government |
| 20th | 1945–1949 | Arza Clair Casselman | Progressive Conservative |
| 21st | 1949–1953 | Arza Clair Casselman | Progressive Conservative |
| 22nd | 1953–1957 | Arza Clair Casselman | Progressive Conservative |
| 23rd | 1957–1958 | Arza Clair Casselman | Progressive Conservative |
| 24th | 1958–1958† | Arza Clair Casselman | Progressive Conservative |
| 24th | 1958–1962 | Jean Casselman (Wadds) | Progressive Conservative |
| 25th | 1962–1963 | Jean Casselman (Wadds) | Progressive Conservative |
| 26th | 1963–1965 | Jean Casselman (Wadds) | Progressive Conservative |
| 27th | 1965–1968 | Jean Casselman (Wadds) | Progressive Conservative |
| Riding dissolved into Grenville—Carleton and Stormont—Dundas |||||

## Election results

1925 Canadian federal election :
| Party | Candidate | Votes |
| | Conservative | Arza Clair Casselman | 8,175 |
| | Liberal | William Garnet Anderson | 5,221 |
1926 Canadian federal election :
| Party | Candidate | Votes |
| | Conservative | Arza Clair Casselman | 8,100 |
| | Progressive | Preston Elliott | 4,744 |
1930 Canadian federal election :
| Party | Candidate | Votes |
| | Conservative | Arza Clair Casselman | 9,498 |
| | Liberal | William John Taugher | 5,078 |
1935 Canadian federal election :
| Candidate | Votes |
| Conservative | Arza Clair Casselman | 8,936 |
| Liberal | Preston Elliott | 6,581 |
| Reconstruction | Claude Allison Patterson | 1,615 |
1940 Canadian federal election :
| Party | Candidate | Votes |
| | National Government | Arza Clair Casselman | 7,225 |
| | Liberal | William John Taugher | 5,642 |
1945 Canadian federal election :
| Candidate | Votes |
| Progressive Conservative | Arza Clair Casselman | 9,306 |
| Liberal | James Franklin Casselman | 4,634 |
| Co-operative Commonwealth | James Shortt | 685 |
1949 Canadian federal election :
| Candidate | Votes |
| Progressive Conservative | Arza Clair Casselman | 8,450 |
| Liberal | James Franklin Casselman | 5,102 |
| Co-operative Commonwealth | Arthur Nelson Orr | 496 |
1953 Canadian federal election :
| Party | Candidate | Votes |
| | Progressive Conservative | Arza Clair Casselman | 8,875 |
| | Liberal | Arthur Clark Casselman | 4,933 |
1957 Canadian federal election :
| Candidate | Votes |
| Progressive Conservative | Arza Clair Casselman | 8,967 |
| Liberal | Arthur C. Casselman | 4,402 |
| Social Credit | R. H. James | 1,072 |
1958 Canadian federal election :
| Candidate | Votes |
| Progressive Conservative | Arza Clair Casselman | 10,793 |
| Liberal | Arthur Clark Casselman | 4,340 |
| Social Credit | R. H. James | 473 |
On Mr. Casselman's death, 11 May 1958:
By-election on 29 September 1958 :
| Party | Party | Candidate | Votes |
| | Progressive Conservative | Jean Casselman | 10,309 |
| | Liberal | Mark Salmon | 5,379 |
1962 Canadian federal election :
| Candidate | Votes |
| Progressive Conservative | Jean Casselman | 10,159 |
| Liberal | Robert Watters | 6,410 |
| New Democratic | Reginald S. Libby | 299 |
| Social Credit | Grace Catherine A. Gough | 258 |
1963 Canadian federal election :
| Candidate | Votes |
| Progressive Conservative | Jean Casselman | 10,434 |
| New Democratic | Reginald S. Libby | 7,207 |
| Liberal | John Palmer | 7,207 |
1965 Canadian federal election :
| Candidate | Votes |
| Progressive Conservative | Jean Casselman Wadds | 9,845 |
| Liberal | John Palmer | 6,930 |
| New Democratic | René Benoit | 595 |