Sir John Keane, 5th Baronet, DSO (3 June 1873 – 30 January 1956) was an Irish barrister and politician.
Keane was educated at Clifton College and Royal Military Academy Woolwich.
He succeeded his father as 5th Baronet in 1892 and was appointed High Sheriff of County Waterford for 1911–12.
He was a member of Seanad Éireann and a director of Bank of Ireland becoming Governor (Chairman) from 1941 to 1943.