C. Douglass Buck (1890–1965) was a U.S. Senator from Delaware 1943 to 1949. Senator Buck may also refer to:
Carrie Buck (politician) (born 1971), Nevada State Senate Clarence F. Buck (1870–1944), Illinois State Senate Daniel Buck (judge) (1829–1905), Minnesota State Senate George L. Buck (1866–1939), Wisconsin State Senate Jim Buck (Indiana politician) (born 1945), Indiana State Senate Leonard W. Buck (1834–1895), California State Senate