David Charles Onley, (born June 12, 1950) is a Canadian former journalist who served as the 28th Lieutenant Governor of Ontario from 2007 until 2014.Prior to his viceregal appointment, Onley was a television journalist.
He worked primarily for Citytv as a weather reporter, before moving on to cover science and technology stories.
Later on, he worked with the 24-hour news station CablePulse 24 as a news anchor and host of a weekly technology series, Home Page.
A published author, he was founding president of the Aerospace Heritage Foundation of Canada.
His seven-year term makes him the longest serving Lieutenant Governor of Ontario since Albert Edward Matthews (1937–1946) and the province's second longest serving viceroy since Confederation.