William Johnston McKee (December 10, 1850 – June 30, 1929) was a Canadian merchant and political figure in Ontario.
He represented Essex North in the Legislative Assembly of Ontario from 1894 to 1902 as a Liberal member.
He was born in Sandwich (later Windsor) in Essex County, Canada West, the son of Thomas McKee Jr. and grandson of Thomas McKee.
McKee was a lumber dealer and also manufactured doors and other wood products.
He also was chairman for the Windsor Board of Water Commissioners.