Seán Brosnan (21 December 1916 – 18 April 1979) was an Irish barrister and Fianna Fáil politician.
He won senior Kerry County Championship medals with Dingle GAA in 1938 and 1941.
He was then elected to the 13th Seanad Éireann on the Administrative Panel, but he regained his Dáil seat in a by-election in November 1974 after the death of his Fianna Fáil colleague Liam Ahern.
[4] Brosnan was re-elected at the 1977 general election to the 21st Dáil, and also served as a Member of the European Parliament (MEP).
After his death in 1979, the resulting by-election on 7 November was won for Fine Gael by Myra Barry.