Daniel L. Hannifin (June 12, 1863 in Portland, Dodge County, Wisconsin â ?), was a member of the Wisconsin State Assembly. He graduated from high school in Waterloo, Wisconsin. For twelve years he was employed at a teaching school, and was also a farmer. He served as bookkeeper and secretary of the Waterloo Canning and Pickeling Company, and was the town clerk of Portland, Wisconsin.
Hannifin was elected to the Assembly in 1902. Additionally, he served as Clerk of Portland. He was a Democrat.