Mark Dayton (born 1947) was a U.S. Senator from Minnesota from 2001 to 2007. Senator Dayton may also refer to:
United States Senate members Jonathan Dayton (1760–1824), U.S. Senator from New Jersey from 1799 to 1805 William L. Dayton (1807–1864), U.S. Senator from New Jersey
United States state senate members George Dayton (politician) (1827–1902), New Jersey State Senate George C. Dayton (1911–1993), Florida State Senate Jesse C. Dayton (1825–1903), New York State Senate Margaret Dayton (born 1949), Utah State Senate