Douglas Dias Jayasinha (11 May 1915 – 28 April 2006) was a Ceylonese cricketer and cricket administrator.
Born in Galle, he was educated at Mahinda College, where he captained his college cricket team from 1934 to 1936.
A left-hand batsman, a handy bowler and slip fielder, he was one of the first from the south of the island to represent All-Ceylon, against New Zealand in 1937 and India in 1945.
He was a national selector from 1961 to 1973, the last ten years as chairman.