Henry St John, 18th Baron St John of Bletso

Henry Beauchamp Oliver St John, 18th Baron St John of Bletso DL (24 June 1876 – 17 October 1920) was an English peer.

He was the eldest son of Beauchamp St John, 17th Baron St John of Bletso, and his wife Helen Thornton.

[1] On 26 July 1901, he was made a deputy lieutenant of Bedfordshire.

[2] Henry became the 17th Lord St John on the death of his father in 1912, and inherited Melchbourne Park.

He died unmarried at the age of 44 and was succeeded by his younger brother, Moubray.