Oliver Ellsworth (1745–1807) was a U.S. Senator from Connecticut from 1789 to 1796. Senator Ellsworth may also refer to:
D. Delos Ellsworth (1931–2013), Arizona State Senate Harris Ellsworth (1899–1986), Oregon State Senate Jason Ellsworth (born 1973), Montana State Senate Stukely Ellsworth (1769–1837), New York State Senate Timothy E. Ellsworth (1836–1904), New York State Senate