Senator Crosby may refer to:
Charles F. Crosby (1847–1889), Wisconsin State Senate Clarkson F. Crosby (1817–1858), New York State Senate Darius Crosby (1760s–1818), New York State Senate Elisha Oscar Crosby (1818–1895), California State Senate John Crawford Crosby (1859–1943), Massachusetts State Senate LaVon Crosby (1924–2016), Nebraska State Senate Moreau S. Crosby (1839–1893), Michigan State Senate Robert B. Crosby (1911–2000), Nebraska State Senate