Johnny Geoghegan (5 November 1913 – 5 January 1975) was an Irish Fianna Fáil politician who served as a Teachta Dála (TD) for more than twenty years.
Geoghegan was elected to Dáil Éireann on his first attempt, at the 1954 general election, taking his seat in the 15th Dáil as TD for the Galway West constituency.
He was re-elected at the next five general elections, taking ministerial office only once, in the 19th Dáil. In the ministerial reshuffle following the dismissal of two Cabinet ministers in the Arms Crisis, Taoiseach Jack Lynch appointed Geoghegan on 9 May 1970 as Parliamentary Secretary to the Minister for Social Welfare, under Minister Joseph Brennan. He served until Fianna Fáil lost power at the 1973 general election.
After his death on 5 January 1975, the by-election for his Galway West seat in the 20th Dáil was held on 4 March and won for Fianna Fáil by his daughter Máire Geoghegan-Quinn.