Senator Sinclair may refer to:
Amy Sinclair (born 1975), Iowa State Senate Charles Sinclair Jr., Senate of Jamaica Donald Sinclair (American politician) (1899–1978), Minnesota State Senate Ian David Sinclair (1913–2006), Senate of Canada Murray Sinclair (1951–2024), Senate of Canada
See also Sinclair Weeks (1893–1972), U.S. Senator from Massachusetts in 1944