Michael Donnellan (1900 – 27 September 1964) was an Irish Clann na Talmhan politician. Donnellan was born in Dunmore, County Galway in 1900. He joined Sinn Féin after the Easter Rising in 1916. Donnellan served as a member of Galway County Council from 1927 until 1945, originally as a member of Fianna Fáil. At the first Ard-Chomhairle of Clann na Talmhan in March 1943, he stated that the party's reason for existing was to "break the stranglehold of the money-grubbers and Jews". According to historian RM Douglas, this was not the only act of anti-Semitism Donnellan committed as party leader.