Laois–Offaly (formerly King's County–Queen's County, Leix–Offaly and Laoighis–Offaly) is a parliamentary constituency which is represented in Dáil Éireann, the lower house of the Irish parliament or Oireachtas. The constituency elects 5 deputies (Teachtaí Dála, commonly known as TDs) on the system of proportional representation by means of the single transferable vote (PR-STV). It was previously a constituency from 1921 to 2016.