The following elections occurred in the year 2004.

• 2004 Algerian presidential election
• 2004 Botswana general election
• 2004 Cameroonian presidential election
• 2004 Comorian legislative election
• 2004 Equatorial Guinean legislative election
• 2004 Ghanaian parliamentary election
• 2004 Ghanaian presidential election
• 2004 Guinea-Bissau legislative election
• 2004 Mahoran legislative election
• 2004 Malawian general election
• 2004 Mozambican general election
• 2004 Namibian general election
• 2004 Nigerien general election
• 2004 Nigerien parliamentary election
• 2004 Nigerien presidential election
• 2004 South African general election

• 2004 Afghan presidential election
• 2004 Hong Kong legislative election
• 2004 Indonesian legislative election
• 2004 Indonesian presidential election
• 2004 Iranian legislative election
• 2004 Kazakhstani legislative election
• 2004 Malaysian general election
• 2004 Mongolian legislative election
• 2004 Pakistani presidential election
• 2004 Philippine general election
• 2004 Republic of China legislative election (Taiwan)
• 2004 Republic of China presidential election (Taiwan)
• 2004 South Korean legislative election
• 2004 Sri Lankan parliamentary election
• 2004 Sri Lankan provincial council election
• 2004 Turkish local elections
• 2004–2005 Uzbekistani parliamentary election

• 2004 Australian Capital Territory general election
• 2004 Australian federal election
  • 'Not happy, John!' campaign
• 2004 Dubbo state by-election
• 2004 Queensland state election

• 2004 Abkhazian presidential election
• 2004 Belarusian parliamentary election
• 2004 Belarusian referendum
• 2004 Belgian regional elections
• 2004 Bosnia and Herzegovina municipal elections
• 2004 Cypriot Annan Plan referendum
• Elections in Alderney
• 2004 European Parliament election in Slovenia
• 2004 Faroese parliamentary election
• 2004 Georgian presidential election
• 2004 Georgian legislative election
• 2004 Greek legislative election
• 2004 Guernsey general election
• 2004 Icelandic presidential election
• 2004 Irish local elections
• 2004 Irish presidential election
• 2004 Kosovan parliamentary election
• 2004 Lithuanian parliamentary election
• 2004 Lithuanian presidential election
• 2004 Luxembourg general election
• 2004 Macedonian autonomy referendum
• 2004 Macedonian presidential election
• 2004 Montenegrin municipal election
• 2004 Romanian legislative election
• 2004 Romanian local election
• 2004 Romanian presidential election
• 2004 Serbian presidential election
• 2004 Slovak presidential election
• 2004 Slovenian parliamentary election
• 2004 South Ossetian parliamentary election
• 2004 Turkish local elections
• 2004 Ukrainian presidential election
• 2004 Vojvodina parliamentary election

• 2004 Panamanian general election
• 2004 Salvadoran presidential election

• 2004 American Samoan general election
• 2004 Cook Islands general election
• 2004 French Polynesian legislative election
• 2003 Nauruan parliamentary election
• 2004 Nauruan parliamentary election
• 2004 New Caledonian legislative election
• 2004 Palauan general election
• 2004 Pitcairn Islands general election
• 2004 Vanuatuan general election

• 2004 Bolivian gas referendum
• 2004 Brazilian municipal elections
• 2004 Venezuelan recall referendum
• 2004 Venezuelan regional elections