Elections to the Seanad, the Senate of the Oireachtas (parliament of the Irish Free State), took place on a triennial basis, with senators elected in stages.

The 1931 Seanad included members nominated in 1922, and members elected at the 1925, 1928 and 1931 Seanad elections.

However, at the 1928 and subsequent Free State Seanad elections, the franchise was restricted to Oireachtas members.

In 1922, 30 Senators had been elected by Dáil Éireann, and 30 had been nominated by the President of the Executive Council, W. T.

[1] The following table shows the composition by party when the 1931 Seanad first met on 9 December 1931.