John Hagan

John Hagan may refer to:

• John Hagan (1785?–1856), American slave trader
• John N. Hagan (1873–1952), North Dakota politician
• John Hagan (sailor) (born 1946), eighth Master Chief Petty Officer of the Navy
• John L. Hagan, American sociologist
• John Hagan (Ohio politician), former Republican member of the Ohio House of Representatives