John Sayer ( - 2 October 1818) was an early Canadian fur trader. He was one of the earliest traders working out of Fort Michilimackinac to winter in the Leech Lake, Minnesota area. During the winter of 1804–1805, he wintered along the Snake River (St. Croix River tributary) near present-day Pine City, Minnesota, where he helped establish the North West Company at the site of present-day Snake River Fur Post.[1]