William Darcy McKeough, (born January 31, 1933) is a former politician in Ontario, Canada.
He was a Progressive Conservative member of the Legislative Assembly of Ontario from 1963 to 1978 who represented the ridings of Kent West and Chatham—Kent.
He was a cabinet minister in the government of Bill Davis.
Due to McKeough's senior position in cabinet as Treasurer, Minister of Economics and Intergovernmental Affairs and Minister of Municipal Affairs, he was often referred to as the 'Duke of Kent'.
After he retired from politics in 1978, he spent a further career in business administering to his companies McKeough Investments and McKeough Supply.
He also spent time as a member of the board of Hydro One and was a former CEO of Union Gas.