John A. Haggerty (June 26, 1841 – March 11, 1910) was an American businessman and politician.
During the American Civil War, Haggerty served in the 3rd Wisconsin Volunteer Infantry Regiment.
He served as treasurer for the town of Utica, Crawford County, Wisconsin.
In 1901, Haggerty served in the Wisconsin State Assembly, where he was on the Dairy and Food Committee.
This article about a Republican Party member of the Wisconsin State Assembly born in the 1840s is a stub.