Bill Cassidy (born 1957) is a U.S. Senator from Louisiana since 2015. Senator Cassidy may also refer to:
Bert Alford Cassidy (1889–1950), California State Senate George W. Cassidy (1836–1892), Nevada State Senate Owen Cassidy (c.1862–1911), New York State Senate Samuel H. Cassidy (born 1950), Colorado State Senate Thomas F. Cassidy (1875–1941), Massachusetts State Senate Vinton Cassidy (fl. 1970s–1990s), Maine State Senate
See also Senator Casady (disambiguation)