The event will be staged at the County Antrim venue for the first time.
This year’s Irish Open was scheduled for Mount Juliet in Kilkenny in May but fell victim to the coronavirus pandemic.
Playing the tournament at the Galgorm Spa & Golf Resort venue, the players will travel from the US Open without having to quarantine.
“With quarantine restrictions for travelers into the Republic of Ireland ongoing and the ban on mass gatherings still in place, the European Tour made the decision to move the tournament to Northern Ireland,” a statement from the European Tour said.
It added that the tournament will now be “subject to similar guidelines to the current ‘UK Swing’ events, including being played behind closed doors”.
We are extremely grateful to Gary Henry and everyone at Galgorm Spa & Golf Resort for stepping up to host us,” added the European Tour statement.
Galgorm Castle’s managing director Henry said that the Ballymena club was “delighted” at the announcement.
“This outstanding tournament is steeped in history and we look forward to welcoming some of the best players in the world to Galgorm Spa & Golf Resort,” he added.