Irish voters have backed the fiscal treaty by a large majority - with 60.3% voting Yes and 39.7% voting No.
In what was Europe's only referendum on the treaty, only five of the 43 constituencies rejected it.
They were Donegal North East, Donegal South West, Dublin South West, Dublin North West and Dublin South Central.
The closest result in the country was in Dublin Mid-West, where the Yes vote won by a margin of just five votes.
National turnout was 50.6%.
Yes campaigners described the result as a decisive step toward recovery.
Those who campaigned on the No side have called on the Government to deliver on its promises for growth and jobs.
Both the Taoiseach and the Tánaiste have insisted they would use the result to strengthen their hand in talks on the bank debt.
Enda Kenny confirmed he had already raised the issue with German Chancellor Angela Merkel this evening.
