2004 European Parliament election in Ireland

The 2004 European Parliament election in Ireland was the Irish component of the 2004 European Parliament election. The voting was held on Friday, 11 June 2004. The election coincided with the 2004 local elections. The election was conducted under the single transferable vote.

Constituency revision
Since the 1999 European Parliament election, Ireland's entitlement had fallen from 15 seats to 13 seats due to European Union expansion and some constituencies boundaries and names were changed.
 * Munster constituency lost County Clare and was reduced from 4 seats to 3 and renamed South
 * Connacht–Ulster gained County Clare and was renamed North-West
 * Leinster had no boundary changes but was reduced from 4 seats to 3 and renamed East
 * Dublin was unchanged

Results
The election was organised by city/county council area, the basis for the local elections being held simultaneously. Voters received different-coloured ballot papers for the European election, city/county council election, and a constitutional referendum, all of which went into the same ballot box and were separated by colour once the boxes arrived at the count centre for the city/county. Not all voters received all ballots as the franchises differ. The European ballots were all counted in one city/county, necessitating a second transportation of the separated ballots from the other city/county centres. For example, the East ballots were counted in Navan, County Meath.