John Ferguson may refer to one of the following:

John Ferguson (settler) was the settler of the city of North Bay, Ontario, Canada

John Ferguson, Sr. was an National Hockey League hockey player

John Ferguson, Jr. is the son of John Ferguson Sr. and current General Manager of the Toronto Maple Leafs

John Ferguson (mayor) was a mayor of New York City (1815).

John Ferguson (judge) was a Louisiana judge, and defendant in the famous 1896 Plessy v. Ferguson United States Supreme Court case which sanctioned official racial segregation.