Eric Trump and his brother Donald Jnr bought pints for everyone in four different pubs in Doonbeg last night.
Hitting the village at around 10pm, the US President's sons visited Morrisey’s, The Igoe Inn, Comerfords and Tubridys.
And Eric described the locals as "the best neighbours in the world".
He told RTE's Morning Ireland: "You see the support it is incredible. It is simply incredible. The whole town showed up and we’ve done a lot for Doonbeg.
"We love Doonbeg. We saved a great hotel. We love the people in this town and they love us...It is amazing.
"I have being watching news all over the world and we have people from Doonbeg on TV saying Trumps are great - they’re the best.
"We have the best neighbours in the world and we love them. We appreciate them. To see the turnout is nothing short of incredible."
Pressed on whether his father would visit the village, he said: "My father is working very hard. He was in Portsmouth today. He will be in Normandy tomorrow for D-day.
"He loves Doonbeg. It’s one of his favourite places in the world."
He added: "It really does feel like this is a second home for us and we have invested tremendous amount of money and the local economy.
"You see it paying off in spades when you see these crowds and the amount of support we have."
Donald Jnr said: "You can see the reception that we get. It is incredible. The town has been so good to us.
"We, obviously, invested here a long time ago. We took a real chance when Ireland wasn’t exactly ... and it has just turned out to be great.
"The warmth and the reception is just amazing."
