Henry St John-Mildmay

Henry St John-Mildmay may refer to:

• Sir Henry St John-Mildmay, 3rd Baronet (1764–1808), MP for Westbury, Hampshire and Winchester
• Sir Henry St John-Mildmay, 4th Baronet (1787–1848), MP for Winchester
• Sir Henry St John-Mildmay, 5th Baronet (1810–1902}, British Army officer
• Sir Henry St John-Mildmay, 6th Baronet (1853–1916), English cricketer and British Army officer