John Leo Gleason (June 27, 1903 – January 8, 1936) was an American politician who was a member of the Massachusetts House of Representatives from 1935 to 1936.

[1] His older brother, Richard D. Gleason, ran a political machine in Boston's Ward 9 and served in the Massachusetts House of Representatives and the Boston City Council.

[2] The younger Gleason served as a city constable and was elected to the Massachusetts House of Representatives in 1934.

[1] On January 7, 1936, Gleason was admitted to the Boston City Hospital for stomach ulcers.

He died suddenly the following morning at his home in Roxbury.