Around 21 of the TDs who were part of the 32nd Dáil are not contesting the General Election.
That includes 4 deputies who retired on election to the European Parliament.
The latest TD to announce retirement is outgoing Minister of State for Training and Skills, John Halligan.
Dr. Adrian Kavanagh is of the Dept. of Geography at Maynooth University.
Speaking to Kildare Today, he says around 11% of sitting TDs are retiring.