Fleadh is a pre-20th C spelling reform rendering of the Irish word (), meaning a festive occasion or banquet. It is used by a number of festivals such as The Philadelphia Fleadh, which have an Irish-originated inspiration. It may also refer to:
Fleadh Cheoil, an Irish music competition run by Comhaltas Ceoltóirí Éireann. Fleadh Nua, an Irish cultural festival. Galway Film Fleadh, a cinematography festival. TUS Thurles Games Fleadh, a game jam.