Grenville-Dundas (provincial electoral district)
# Grenville-Dundas (provincial electoral district)

Grenville-Dundas was an electoral riding in Ontario, Canada, that was represented in the Legislative Assembly of Ontario from 1934 to 1975. It was created in 1934 from the ridings of Grenville and Dundas. In 1975, Grenville was redistributed into the riding of Carleton-Grenville, and Dundas was redistributed into the riding of Stormont-Dundas and Glengarry.

## Members of Provincial Parliament

Grenville-Dundas :

| Assembly | Years | Member | Party |
| - | - | - | - |
| 19th | 1934–1937 | George Holmes Challies | Conservative |
| 20th | 1937–1943 | George Holmes Challies | Conservative |
| 21st | 1943–1945 | George Holmes Challies | Progressive Conservative |
| 22nd | 1945–1948 | George Holmes Challies | Progressive Conservative |
| 23rd | 1948–1951 | George Holmes Challies | Progressive Conservative |
| 24th | 1951–1955 | George Holmes Challies | Progressive Conservative |
| 25th | 1955–1959 | Frederick Cass | Progressive Conservative |
| 26th | 1959–1963 | Frederick Cass | Progressive Conservative |
| 27th | 1963–1967 | Frederick Cass | Progressive Conservative |
| 28th | 1967–1971 | Frederick Cass | Progressive Conservative |
| 29th | 1971–1975 | Donald Roy Irvine | Progressive Conservative |
| Sourced from the Ontario Legislative Assembly |||||
| Redistributed into the ridings of Carleton-Grenville and Stormont-Dundas and Glengarry before the 1975 election |||||
