Sir Henry Somer Gullett KCMG (26 March 1878 – 13 August 1940) was an Australian politician who served as a member of the House of Representatives from 1925 until his death in the 1940 Canberra air disaster.
He was a minister in the governments of Stanley Bruce, Joseph Lyons, Earle Page, and Robert Menzies, including as Minister for External Affairs under Menzies.