European Parliament elections were held in Greece on 13 June 2004 to elect 24 Greek members of the European Parliament. Members were elected by party-list proportional representation with a 3% electoral threshold.

The 2004 European election was the sixth election to the European Parliament. The ruling New Democracy party made strong gains, while the opposition PASOK made smaller gains, both at the expense of minor parties. The traditionalist Popular Orthodox Rally, contested in the election for the first time and elected one MEP.

Party		Votes	%	Seats	+/–
	New Democracy—Political Spring	2,633,574	43.01	11	+2
	PASOK	2,083,327	34.03	8	–1
	Communist Party of Greece	580,396	9.48	3	0
	Synaspismos	254,447	4.16	1	–1
	Popular Orthodox Rally	252,429	4.12	1	New
	Women for Another Europe	46,565	0.76	0	New
	Democratic Regional Union	44,541	0.73	0	New
	Ecologist Greens	40,873	0.67	0	0
	Union of Centrists	34,511	0.56	0	0
	Greek Ecologists	32,956	0.54	0	0
	Marxist–Leninist Communist Party of Greece	21,220	0.35	0	0
	Hellenic Front	15,243	0.25	0	0
	Democratic Socialist Movement	13,627	0.22	0	New
	Radical Left Front	13,387	0.22	0	0
	Anti-Capitalist Coalition	11,938	0.19	0	0
	Fighting Socialist Party of Greece	11,598	0.19	0	0
	Patriotic Alliance	10,618	0.17	0	New
	Rainbow	6,176	0.10	0	0
	Vision	5,996	0.10	0	New
	Organization for the Reconstruction of the Communist Party of Greece	5,090	0.08	0	0
	European Confederacy	3,791	0.06	0	New
	Alternative Ecologists	284	0.00	0	0
	Christianity	45	0.00	0	0
Total		6,122,632	100.00	24	–1
Valid votes		6,122,632	97.44
Invalid/blank votes		161,005	2.56
Total votes		6,283,637	100.00
Registered voters/turnout		9,938,863	63.22
Source: Ministry of the Interior