The senators served until the close of poll for the 13th Seanad in 1973.

There are a total of 60 seats in the Seanad: 43 were elected on five vocational panels, 6 were elected from two university constituencies and 11 were nominated by the Taoiseach.

The following table shows the composition by party when the 12th Seanad first met on 5 November 1969.

[2] On 1 January 1973, Yeats resigned as Cathaoirleach on his appointment as a member of the Irish delegation in the European Parliament.

James Dooge was proposed by Michael O'Higgins (FG) and seconded by Charles McDonald (FG).