Major Sir Henry Paulet St John-Mildmay, 6th Baronet (28 April 1853 – 24 April 1916) was an English baronet and first-class cricketer. Mildmay was a right-handed batsman. He was the son of Sir Henry St John-Mildmay, 5th Baronet by his wife Hon Helena Shaw Lefevre, and succeeded his father as baronet in 1902. In addition to being a cricketer, St John-Mildmay served in Grenadier Guards, where he held the rank of Major. St John-Mildmay later became the 6th Baronet St. John. St John-Mildmay died at Dogmersfield, Hampshire on 24 April 1916.