Monsignor John Delaney scooped a huge €500,000 with a quick pick ticket while at home for Christmas in Ireland in Donnybrook Fair in Malahide.
The minister is originally from Farmhill, Crossboyne in Co Mayo, but has now retired and lives in Florida,
Msgnr Delaney joked that God must be listening to his prayers - because this is not his first lottery win.
He said that he had previously won £15,000 Irish pounds on the old Irish Sweepstakes.
According to Dublin Live, he had also won amounts of $3,000 and $5,000 over the years in lotteries in the States.
Describing how he learned of his win, he said that he heard on Saturday that one of two winning EuroMillions Plus tickets was purchased in Donnybrook Fair in Malahide.
He added: "I didn't get too excited when I heard this first. I went back to the shop and gave the ticket to the same girl I had purchased it from to be checked.
"Lo and behold there was a message on the system to contact the National Lottery! So I knew at that stage I had won."
Delaney regularly visits Ireland and said he spent a lovely Christmas Day with relatives in Dublin.
He said: "I am a big believer that what goes around comes around. This is a huge amount of money and I look forward to giving some back."
Msgr Delaney told The Irish Times: "God gave it to me for some reason and I will give it away."
He has promised that he will share his winnings with those in need.