| Office: | Teachta Dála |
| Term Start: | May 1954 |
| Term End: | 29 April 1967 |
| Constituency: | Cork Borough |
| Birth Date: | 9 May 1922 |
| Birth Place: | Cork, Ireland |
| Death Place: | Cork, Ireland |
| Nationality: | Irish |
| Party: | Labour Party |
Seán Casey (9 May 1922 – 29 April 1967) was an Irish Labour Party politician and trade union official. He was first elected to Dáil Éireann as a Labour Party Teachta Dála (TD) for the Cork Borough constituency at the 1954 general election.[1] He was re-elected at the 1957, 1961 and 1965 general elections.[2] He died in April 1967 during the term of the 18th Dáil and the by-election held on 9 November 1967 was won by Seán French of Fianna Fáil.
He served as Lord Mayor of Cork in 1956, 1962 and 1966.[3]