However, Hoolahan will have turned 36 by the start of the UEFA Nations League in September, and that has played a part in his decision to focus on club football after winning 43 caps.
Hoolahan is quoted by The Independent as saying: "It's a mixture of things that led me to make this decision but mainly age, I will be 36 soon, I'll be 38 when the next Euros come around, so it's time to move aside.
"I had a great two campaigns with Ireland and the Euros in France was an amazing experience,
"I spoke to Martin O'Neill last week and he accepted my decision. He didn't try and talk me around, he knew my mind was made up and it was time to go."
Hoolahan's last appearance came against Denmark in the World Cup playoffs late last year.