The 30th Dáil lasted 3 years, 232 days, and saw a change of Taoiseach from Bertie Ahern to Brian Cowen.

The 30th Dáil was dissolved by President Mary McAleese on 1 February 2011, at the request of the Taoiseach Brian Cowen.

On 14 June 2007, Fianna Fáil, the Green Party and the Progressive Democrats, denoted with bullets (●), formed the 27th government of Ireland, led by Bertie Ahern as Taoiseach.

On 14 June 2007, John O'Donoghue (FF) was proposed by Bertie Ahern for the position of Ceann Comhairle.

On 3 November 2010, Nicholas Kearns, president of the High Court, made a declaration that there has been an unreasonable delay in moving the writ for the by-election in Donegal South-West.