William Thomas Cosgrave (Erse: Liam Tomás Mac Cosgair; 6 Juin 1880 – 16 November 1965), maistly kent as W.T. Cosgrave, wis an Erse politeecian wha succeeded Michael Collins as preses o the Erse Proveesional Government frae August tae Dizember 1922. He sert as the first Preses o the Executive Cooncil (Heid o govrenment) o the Erse Free State frae 1922 tae 1932.