An election to Seanad Éireann, the Senate of the Oireachtas (Irish parliament), followed the 1948 general election to the 13th Dáil.

The senators served until the close of poll for the 7th Seanad in 1951.

On 21 April 1948, Timothy O'Donovan (FG), the outgoing Leas-Cathaoirleach, was proposed by Michael Hayes (FG) and seconded by Luke Duffy (Lab) for the position of Cathaoirleach.

[2] 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.

[3] The following table shows the composition by party when the 6th Seanad first met on 21 April 1948.