The FAI confirmed it will be joining the study after "recent positive discussions amongst all parties".
England, which hosted and won the 1966 World Cup, failed in bids to host the event in 2006 and 2018.
The 2026 World Cup will be hosted jointly by the United States, Mexico and Canada, while a South American tri-nation bid involving Argentina, Uruguay and Paraguay has already been announced for 2030.
(Reporting by Hardik Vyas in Bengaluru, editing by Nick Mulvenney)
