| 13th Seanad | |
| Body: | Seanad Éireann |
| Country: | Ireland |
| Meeting Place: | Leinster House |
| Term Start: | 1 June 1973 |
| Term End: | 16 August 1977 |
| Before: | 12th Seanad |
| After: | 14th Seanad |
| Membership1: | 60 |
| Chamber1 Leader1 Type: | Cathaoirleach |
| Chamber1 Leader1: | James Dooge (FG) |
| Chamber1 Leader2 Type: | Leas-Chathaoirleach |
| Chamber1 Leader2: | Evelyn Owens (Lab) |
| Chamber1 Leader3 Type: | Leader of the Seanad |
| Chamber1 Leader3: | Michael O'Higgins |
| Government: | 14th government of Ireland |
The 13th Seanad was in office from 1973 to 1977. An election to Seanad Éireann, the Senate of the Oireachtas (Irish parliament), followed the 1973 general election to the 20th Dáil. The senators served until the close of poll for the 14th Seanad in 1977.
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 13th Seanad first met on 1 June 1973.
| Vocational panels | NUI | DU | Nominated | Total | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Admin | Agri | Cult & Educ | Ind & Comm | Labour | ||||||||
| Fianna Fáil | 4 | 5 | 2 | 4 | 3 | 0 | 0 | 0 | 18 | |||
| 3 | 5 | 2 | 3 | 4 | 0 | 0 | 7 | 24 | ||||
| 0 | 1 | 1 | 1 | 3 | 1 | 0 | 4 | 11 | ||||
| 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | ||||
| Independent | 0 | 0 | 0 | 1 | 1 | 2 | 2 | 0 | 6 | |||
| Total | 7 | 11 | 5 | 9 | 11 | 3 | 3 | 11 | 60 | |||