The Seanad abolition referendum has been decisively defeated by 42,500 votes.
The proposal was defeated by 48.3pc for Yes to 51.7pc for No, off a turnout of 39.2pc.
Dublin voted overwhelmingly against the proposal for the 32nd amendment of the Constitution, with the results mixed across the rest of the country.
The biggest No vote was in Dublin South-East with 61pc and the largest Yes was in Mayo with 57pc.
The total poll was 1.2 million, with 591,937 Yes votes and 634,437 No votes.
Taoiseach Enda Kenny will issue his response to the result later this evening in Dublin Castle.
No campaigners are calling for the Government to reform the Seanad on the back of the results.
By Fionnan Sheahan