| Country | Date | Electee (elected party) | Change or return* | Other information |
| Algeria | 8 Apr | Abdelaziz Bouteflika (coalition including the Islamist Movement for the Society of Peace) | Return | Algerian presidential election, 2004 |
Australia | 9 Oct | John Howard (Liberal Party of Australia) | Return | Australian legislative election, 2004 | | Canada | 28 June | Paul Martin (Liberal Party of Canada) | Return | Canadian federal election, 2004 |
| India | 13 May | Dr. Manmohan Singh (United Progressive Alliance) | Change | Indian general elections, 2004 |
| Ireland | 22 Oct | Mary McAleese (Fianna Fil) | Return | Irish presidential election, 2004 |
| Romania | 28 Nov & 12 Dec | Traian Băsescu (Justice & Truth alliance) | Change | 12 candidates contested the original elections. None received more than 50% of the vote so a run-off was held between the two leading candidates. |
| Spain | 14 Mar | Jos Zapatero (Spanish Socialist Workers' Party) | Change | Spanish legislative election, 2004 The ruling party, the People's Party, are said to have lost the elections partly due to the effect on the nation of the 11 March 2004 Madrid attacks. |
| Taiwan | 20 Mar | Chen Shui-bian (Democratic Progressive Party) | Return | ROC presidential election, 2004 |
| United States | 2 Nov | George W. Bush (Republican) | Return | U.S. presidential election, 2004 |
Ukraine | 31 Oct & 26 Dec | Viktor Yushchenko (Our Ukraine) | Change | Ukrainian presidential election, 2004 The second part of the election, the runoff between the two most popular candidates from the first round, was originally run on 21 Nov, but the result was later dismissed by the Ukrainian Supreme Court due to alegations of fraud on behalf of then-Prime Minister and victor of that election, Viktor Yanukovych. |