Denis Daly (1748 – 10 October 1791) of Carrownakelly and Dunsandle Castle, Loughrea, County Galway, was an Irish landowner and politician.

Though traditionally Roman Catholics, and of Gaelic origin, the Dalys had been able to hold on to their lands by converting to the Protestant faith and forsaking their allegiance to the Stuart dynasty.

He had to sell off half of these estates to pay his debts, but on his marriage to Lady Henrietta Maxwell, his fortunes once again increased.

His family residence was Carrownakelly Castle, in the parish of Kiltullagh, where the Dalys had lived for several generations, but he moved some four miles south towards Loughrea where he built Dunsandle House, sometime in the mid-18th century.

Daly was a friend of Henry Grattan, who had great respect for his political skills, and like him sat in the Irish House of Commons.