Geoffrey Winthrop Young (25 October 1876 – 8 September 1958) was a British climber, poet and educator, and author of several notable books on mountaineering.
Young was born in Kensington, the middle son of Sir George Young, 3rd Baronet, a noted classicist and charity commissioner, of Formosa Place at Cookham in Berkshire, where he grew up. His mother, formerly Alice Eacy Kennedy, was the daughter of Dr Evory Kennedy of Belgard Co. Dublin and had previously lived in India as Lady Lawrence, wife of Sir Alexander Lawrence, Bt, nephew to the Viceroy, Lord Lawrence. Widowed when Sir Alexander died in a bridge collapse, Alice returned to England, marrying Sir George in 1871. Winthrop's brother Edward Hilton Young became the 1st Baron Kennet. His son Jocelin Winthrop Young was a Royal Navy officer and educator who founded the Round Square association of schools and was private tutor to Constantine II of Greece.