Ernest McFarland (1894–1984) was a U.S. Senator from Arizona from 1941 to 1953.
Senator McFarland may also refer to:
- Basil McFarland (1898–1986), Northern Irish Senate
- David McFarland (politician) (1822–1902), Wisconsin State Senate
- James T. McFarland (born 1930), New York State Senate
- Jim McFarland (born 1947), Nebraska State Senate
- Noah C. McFarland (1822–1897), Ohio State Senate and Kansas State Senate