The event will return to Northern Ireland for the first time since 1951. The decision to bring the tournament to County Antrim follows the successful staging of the Irish Open in 2012.
Northern Ireland's major winners Rory McIlroy, Graeme McDowell and Darren Clarke led the calls for the Open to return to Portrush.
Two-times major winner McIlroy said winning the Open at Portrush would be the pinnacle of his career.
"It's going to be incredible and I'm already looking forward to it," he said.
At Fairmount Coast Cottage and Fairmount Coast Lodge we are very excited about The Open Championship coming to Portrush as soon as 2019!