Samuel O'Flaherty (1895 – 22 May 1930) was an Irish Sinn Féin politician. He first stood for election at the 1918 general election as a Sinn Féin candidate for the Donegal East constituency but was defeated by Edward Kelly of the Irish Parliamentary Party. An electoral pact was brokered by Cardinal Michael Logue under which eight seats in northern Ireland were allocated either to the Irish Parliamentary Party or to Sinn Féin and not contested by the other. In the election Kelly obtained 7,596 votes to the Unionist's 4,797. O'Flaherty, the unofficial Sinn Féin candidate broke the pact but obtained a mere 46 votes.