Ronald Thomas Leeson (born 26 February 1939) is a former Australian politician who was a Labor Party member of the Legislative Council of Western Australia from 1971 to 1983, representing the South-East Province.
Leeson was born in Laverton (a remote Goldfields town) to Amelia May (née Lawer) and George Thomas Leeson.
From 1967 to 1972, he also served as secretary of the Amalgamated Engineering Union.
At the 1983 election, Leeson attempted to transfer to South Province, but was defeated by David Wordsworth (the sitting Liberal Party member).
After leaving parliament, he was a committee member of the WA Greyhound Racing Board.