Tuosist (Irish: Tuath Ó Siosta, meaning 'territory of O'Siosta')[1] is a small village and civil parish in the far south of County Kerry, Ireland.

The parish is part of the barony of Glanrought and is divided into three electoral divisions: Dawros, Ardea and Glenmore.

The main local sport is Gaelic football, organised by Tuosist GAA club.

Phil O'Sullivan from Tuosist captained Kerry GAA to an All-Ireland Senior Football Championship title in 1924.

He is believed to have departed from Kilmacillogue harbour in Tuosist on his mission to Würzburg, Germany.