William Kirkpatrick McNaught CMG (September 6, 1845 – February 2, 1919) was an Ontario manufacturer and political figure.

He represented Toronto North in the Legislative Assembly of Ontario from 1906 to 1914 as a Conservative member.

He was born in Fergus, Canada West, the son of John and Sarah McNaught who were Scottish immigrants.

[1][2] He attended schools in Brantford and also the Bryant and Stratton Commercial College in Toronto.

He defeated the Liberal candidate Thomas Urquhart who was the mayor of Toronto by 1,301 votes.