Joseph Verdi Graff (born July 1, 1854) was a Republican member of the United States House of Representatives from Illinois. Representing Illinois’s 16th Congressional District, he served eight consecutive terms in Congress. His tenure in the U.S. House began on December 2, 1895, and concluded on March 3, 1911, marking a legislative career that extended across the turn of the twentieth century.

During his time in office, Graff served as a Representative for Illinois under the Republican Party, participating in the national legislative process for sixteen years. Although specific committee assignments, legislative initiatives, and personal details are not provided in the available record, his long service from 1895 to 1911 indicates sustained support from his constituents in the 16th District. Joseph Verdi Graff is recognized as a historical member of Congress and is identified in official records by the bioguide ID G000351.