Denis Gallagher (23 November 1922 – 3 November 2001) was an Irish Fianna Fáil politician. He served as Minister for the Gaeltacht on two occasions. Denis Gallagher was born in Currane, by Clew Bay, facing Achill Island, County Mayo in 1922. He was educated locally and at Coláiste Éinde in Salthill. He qualified as a national school teacher having graduated from St Patrick's College in Drumcondra, Dublin. He taught in Drimnagh in Dublin for several years before returning to Mayo in 1946 to take up a teaching post. Gallagher stood as a Clann na Poblachta candidate at the 1954 general election for Mayo North but was not elected.