Sir John William Campbell, 1st Baronet, (1836–1915) was a major-general in the British Army who served in the Crimean War in 1855, in the China campaign in 1860 and in the Second Anglo-Afghan War in 1879–80. He was made a Companion of the Order of the Bath in 1886. He was appointed 1st Lieutenant in the Royal Artillery in 1855; his service in the Crimea in 1854-5 was "in the trenches with the siege train before Sebastopol," for which he was awarded a medal and clasp.