Senator Watson may refer to:
Members of the United States Senate Clarence Wayland Watson (1864–1940), U.S. Senator from West Virginia from 1911 to 1913 James Eli Watson (1864–1948), U.S. Senator from Indiana from 1916 to 1933 James Watson (New York politician) (1750–1806), U.S. Senator from New York from 1798 to 1800 Thomas E. Watson (1856–1922), U.S. Senator from Georgia from 1921 to 1922
United States state senate members Ben Watson (politician) (born 1959), Georgia State Senate Bo Watson (born 1960), Tennessee State Senate Clinton Watson (1888–1958), Missouri State Senate Diane Watson (born 1933), California State Senate Frank Watson (American politician) (born 1945), Illinois State Senate James F. Watson (1840–1897), Oregon State Senate James Lopez Watson (1922–2001), New York State Senate John H. Watson (Vermont judge) (1851–1929), Vermont State Senate Kirk Watson (born 1958), Texas State Senate Michael Watson (Mississippi politician) (born 1977), Mississippi State Senate Murray Watson Jr. (1932–2018), Texas State Senate Thomas Philip Watson (1933–2015), Oklahoma State Senate William T. Watson (1849–1917), Delaware State Senate
Other John William Clark Watson (1808-1890), Confederate States Senator from Mississippi from 1864 to 1865