The following elections occurred in the year 1991.
Africa
- 1991 Algerian legislative election
- 1991 Beninese parliamentary election
- 1991 Beninese presidential election
- 1991 Burkinabé presidential election
- 1991 Cape Verdean parliamentary election
- 1991 Cape Verdean presidential election
- 1991 Mauritian general election
- 1991 Sierra Leonean constitutional referendum
- 1991 São Tomé and Príncipe legislative election
- 1991 São Tomé and Príncipe presidential election
- 1991 Zambian general election
Asia
- 1991 Bangladeshi general election
- 1991 Nepalese legislative election
- 1991 Republic of China National Assembly election
- 1991 Singaporean general election
- 1991 Sarawak state election
- 1991 Uzbekistani presidential election
- 1991 Turkish general election
India
- 1991 Indian general election
- Indian general election in Andhra Pradesh, 1991
- Indian general election in Haryana, 1991
- Indian general election in Tamil Nadu, 1991
- 1991 Tamil Nadu legislative assembly election
Malaysia
Europe
- 1991 Abkhazian New Union Treaty referendum
- 1991 Åland legislative election
- 1991 Albanian parliamentary election
- 1991 Belgian general election
- 1991 Bulgarian parliamentary election
- 1991 Cypriot legislative election
- Estonian independence referendum, 1991
- 1991 Finnish parliamentary election
- 1991 Georgian independence referendum
- 1991 Icelandic parliamentary election
- 1991 Irish local elections
- 1991 Macedonian independence referendum
- 1991 Norwegian local elections
- 1991 Polish parliamentary election
- 1991 Portuguese legislative election
- 1991 Portuguese presidential election
- 1991 Stockholm municipal election
- 1991 Swedish general election
- 1991 Swedish municipal elections
- 1991 Ukrainian independence referendum
- 1991 Ukrainian presidential election
- 1991 Turkish general election
Austria
Germany
Moldova
- 1991 Moldovan presidential election
- 1991 Transnistrian independence referendum
- 1991 Transnistrian presidential election
Russia
Spain
United Kingdom
- 1991 Hemsworth by-election
- 1991 Kincardine and Deeside by-election
- 1991 Langbaurgh by-election
- 1991 Liverpool Walton by-election
- 1991 Monmouth by-election
- 1991 Neath by-election
- 1991 Ribble Valley by-election
United Kingdom local
English local
- 1991 Bristol City Council elections
- 1991 Manchester Council election
- 1991 Trafford Council election
- 1991 Wolverhampton Council election
North America
- 1989–1991 Belizean municipal elections
- 1991 Salvadoran legislative election
- 1991 Mexican legislative election
Canada
- 1991 Brantford municipal election
- 1991 British Columbia general election
- 1991 British Columbia recall and initiative referendum
- 1991 New Brunswick general election
- 1991 Northwest Territories general election
- 1991 Ottawa municipal election
- 1991 Progressive Conservative Party of New Brunswick leadership election
- 1991 Saskatchewan general election
- 1991 Toronto municipal election
- 1991 Windsor municipal election
Caribbean
- 1991 Barbadian general election
- 1990–1991 Haitian general election
- 1991 Montserratian general election
- 1991 Trinidad and Tobago general election