|Preceded by||Rhéal Bélisle|
|Succeeded by||Floyd Laughren|
|Born||November 23, 1935|
|Died||February 7, 2004 (aged 68)|
Sudbury, Ontario, Canada
|Political party||Progressive Conservative|
Gaston Joseph Clément Demers (November 23, 1935 – February 7, 2004) was a politician in Ontario, Canada. He was a Progressive Conservative member of the Legislative Assembly of Ontario from 1963 to 1971 who represented the northern Ontario riding of Nickel Belt.
Before entering politics, Demers had worked as a journalist for the North Bay Nugget and as a town clerk in Chelmsford. At the time of his election, he was the youngest Member of Provincial Parliament ever elected to the provincial legislature.