William Duckworth (October 25, 1884 – November 8, 1951) was an Ontario merchant and political figure.
He represented Dovercourt in the Legislative Assembly of Ontario from 1934 to 1948 as a Conservative and then Progressive Conservative member.
He was born in Garafraxa Township, Dufferin County, Ontario, the son of Samuel Duckworth, and was educated in Orangeville.
He was a farmer in Luther Township for some time before moving to Toronto where he established a wholesale produce business.
In 1908, he married a Miss Taylor.
Duckworth served on the city council for several years and was a member of the Orange Order.