David Charles Onley CM OOnt (June 12, 1950 – January 14, 2023) was a Canadian broadcaster and writer who served as the 28th lieutenant governor of Ontario from 2007 until 2014.

His seven-year term as Lieutenant Governor of Ontario makes him the province's third longest-serving viceroy since Confederation,[1] behind Albert Edward Matthews (1937–1946) and his successor Elizabeth Dowdeswell (2014–2023).

[4][5] In order to facilitate medical treatment, the family moved to Scarborough (now part of Toronto), settling on Orchard Park Drive in the neighbourhood of West Hill.

[11] He was educated at the University of Toronto Scarborough, served as student council president,[12][13] and graduated in 1975 with an honours Bachelor of Arts degree and specialist certificate in political science.

[10][7] He began hosting a weekly science show for Toronto radio station CFRB, subsequently joining the CKO network in 1983.

In a 2004 interview with Link Up, a Toronto employment agency for people with disabilities, Onley stated that At the time I remember saying to my mother, "I don't know if I should take this job (at Citytv).

[20] Onley returned to his acting roots, with a cameo appearance in the sixth season of the Canadian TV series Murdoch Mysteries.

Onley also stated, in his installation speech, that he would expand on his immediate predecessor James Bartleman's First Nations literacy initiatives, his aim being to see computers on every student's desk in northern schools.

[24] For his installation, Onley approached the legislature on his electric scooter, however he ascended the Throne on foot, using leg braces and canes.

[26] Onley delivered his last speech from the throne to the Ontario Legislative Assembly on July 3, 2014;[10][27] his last full day in office was September 22, 2014, with his successor sworn in the following afternoon.

[30] Onley was appointed senior lecturer in the Department of Political Sciences at University of Toronto Scarborough (UTSC), his alma mater.

[33] In the report, Onley raises concerns that based on consultations with disabled citizens and their family members, the province is not on track to meet 2025 AODA goals.