O' Donnell Park is a GAA stadium in County Donegal, Ireland. The home ground of the St Eunan's club, it is situated between the Letterkenny Regional Sports and Leisure Complex and Ballymacool Park on the outskirts of the town. The Donegal county football team uses O'Donnell Park as a venue for matches.

St Eunans GAA is a dual club which plays hurling and Gaelic football. Its home ground is O'Donnell Park in Letterkenny. It fields 35 teams, making it the biggest club in its county.