Senator Cowan may refer to:

  • Edgar Cowan (1815–1885), U.S. Senator from Pennsylvania from 1861 to 1867
  • Jim Cowan (born 1942), Canadian Senator for Nova Scotia from 2005 to 2017
  • Mo Cowan (born 1969), U.S. Senator from Massachusetts in 2013
  • Thomas F. Cowan (1927–2010), New Jersey State Senate

See also

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  • Anna Cowin (fl. 1960s–2000s), Florida State Senate