Senator Barnett may refer to:
Guy Barnett (Australian politician) (born 1962), Senate of Australia James Barnett (New York politician) (1810–1874), New York State Senate Jim Barnett (Kansas politician) (born 1955), Kansas State Senate Juan Barnett (born 1970), Mississippi State Senate (2016-2026) Mickey D. Barnett, New Mexico State Senate William Barnett (Georgia politician) (1761–1832), Georgia State Senate