Captain Sir Ion Hamilton Benn, 1st Baronet, CB, DSO, TD (31 March 1863 – 12 August 1961) was a British politician and businessman.

He was the third son of the Reverend J. W. Benn, Church of Ireland rector of Carrigaline and Douglas, and his wife Maria (née Hamilton).

[1][2] He was educated at Merchant Taylors' School and then joined Price & Pierce Ltd, a leading timber firm.

While Benn succeeded in beating Cecil, the split in the Conservative vote allowed Richard Stephens Jackson of the Liberal Party to take the seat.

[2] On 23 June 1925 Benn was made a knight of the Grand Priory of the Order of the Hospital of Saint John of Jerusalem in England,[14] and on 11 May 1926 received the Territorial Decoration.

[15] Benn served on the executive committee of the National Playing Fields Association from its inaugural meeting at the Royal Albert Hall in July 1925.