John Willson (August 5, 1776 – May 26, 1860) was a judge and political figure in Upper Canada.
In 1809, he was elected to the 5th Parliament of Upper Canada in a by-election in the West riding of York County.
In his later periods in office, he adopted more a more conservative position, although he continued to represent the interests of farmers.
In 1832, he supported a bill to dispose of the clergy reserves, proposing that the proceeds go to education.
His great-great-granddaughter Dr. Elizabeth Bradford Holbrook (1913–2009) was one of Canada's preeminent portrait sculptors.