More than 236,000 new jobs are predicted for the island of Ireland by 2022.
The EY Economic Eye is also forecasting growth of 4.9% for the rest of the year.
The findings show Dublin has been identified as the most popular post-Brexit location for UK business - ahead of Frankfurt, Luxembourg and Paris.
21 financial services organisations have confirmed they will move all or some of their operations to the capital, as a result of Brexit.
EY Ireland Chief Economist, Professor Neil Gibson, says it is good news but the Government needs to avoid overspending.
"Our new forecasts do paint a very optimistic picture, particularly around the labour market," said Professor Gibson.
"We know there are a lot of question marks over how strong the economy actually is around the headline GDP numbers.
"But the job creation is a terrific record and we're expecting over a quarter of a million jobs over the next four or five years."
- Digital Desk