'''Senator Barnes''' may refer to:
* Charles N. Barnes (1860–1932), Illinois State Senate * Clark Barnes (born 1950), West Virginia State Senate * Henson P. Barnes (1934–2015), North Carolina State Senate * John Barnes (Australian politician) (1868–1938), Senate of Australia * John R. Barnes (1833–1919), Utah State Senate * John Barnes Jr. (born 1931), New Hampshire State Senate * Julius Steele Barnes (1792–1870), Connecticut State Senate * Monica Barnes (1936–2018), Senate of Ireland * Peter J. Barnes III (born 1956), New Jersey State Senate * Roy Barnes (born 1948), Georgia State Senate * Stan Barnes (politician) (born 1961), Arizona State Senate * Tim Barnes (politician) (born 1958), Tennessee State Senate * Tina Rose Muña Barnes (born 1962), Senate of Guam * William D. Barnes (1856–1927), New York State Senate
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