The following elections occurred in the year 2003.
Africa
- 2003 Beninese parliamentary election
- 2003 Djiboutian parliamentary election
- 2003 Guinean presidential election
- 2003 Mauritanian presidential election
- 2003 Nigerian parliamentary election
- 2003 Nigerian presidential election
- 2003 Rwandan presidential election
- 2003 Rwandan parliamentary election
- 2003 Somaliland presidential election
- 2003 Swazi parliamentary election
- 2003 Togolese presidential election
Asia
- 2003 Azerbaijani presidential election
- 2003 Cambodian parliamentary election
- 2003 Israeli legislative election
- 2003 Jordanian parliamentary election
- 2003 Kuwaiti parliamentary election
- 2003 Maldivian presidential election
- 2003 North Korean parliamentary election
- 2003 Omani parliamentary election
- 2003 Syrian parliamentary election
- 2003 Yemeni parliamentary election
- State Assembly elections in India, 2003
Japan
Europe
- 2003 Åland legislative election
- 2003 Armenian presidential election
- 2003 Armenian parliamentary election
- 2003 Belgian general election
- 2003 Corsican autonomy referendum
- 2003 Croatian parliamentary election
- 2003 Cypriot presidential election
- 2003 Czech European Union membership referendum
- 2003 Estonian parliamentary election
- 2003 Finnish parliamentary election
- 2003 Georgian constitutional referendum
- 2003 Georgian legislative election
- 2003 Gibraltar general election
- 2003 Icelandic parliamentary election
- 2002–2003 Lithuanian presidential election
- 2003 Maltese European Union membership referendum
- 2003 Maltese general election
- 2003 Monegasque parliamentary election
- February 2003 Montenegrin presidential election
- May 2003 Montenegrin presidential election
- 2003 Northern Cyprus parliamentary election
- 2003 Norwegian county council election
- 2003 Norwegian local elections
- 2003 Serbian parliamentary election
- 2003 Moldovan local elections
- 2003 Transnistrian referendum
- 2003 Dutch general election
- 2003 Russian legislative election
- 2003 Sammarinese local elections
- 2003 Swedish euro referendum
Austria
Germany
- 2003 Bavaria state election
- 2003 Bremen state election
- 2003 Hesse state election
- 2003 Lower Saxony state election
Italy
- 2003 Friuli-Venezia Giulia regional election
- 2003 Trentino-Alto Adige/Südtirol provincial elections
- 2003 Valdostan regional election
Spain
- 2003 Catalan parliamentary election
- Elections to the Corts Valencianes, 2003
- Elections to the Aragonese Corts, 2003
- May 2003 Madrilenian regional election
- October 2003 Madrilenian regional election
Switzerland
United Kingdom
- 2003 Brent East by-election
- 2003 Conservative Party leadership election
- United Kingdom elections, 2003
- 2003 Liberal Democrats deputy leadership election
- 2003 United Kingdom local elections
- 2003 National Assembly for Wales election
- 2003 Northern Ireland Assembly election
- 2003 Scottish Parliament election
United Kingdom local
English local
- 2003 Adur Council election
- 2003 Allerdale Council election
- 2003 Alnwick Council election
- 2003 Amber Valley Council election
- 2003 Arun Council election
- 2003 Ashfield Council election
- 2003 Ashford Council election
- 2003 Aylesbury Vale Council election
- 2003 Babergh Council election
- 2003 Barrow-in-Furness Council election
- 2003 Bassetlaw Council election
- 2003 Blackpool Council election
- 2003 Bolton Council election
- 2003 Brentwood Council election
- 2003 Broxbourne Council election
- 2003 Burnley Council election
- 2003 Calderdale Council election
- 2003 Cherwell Council election
- 2003 Chichester Council election
- 2003 Chorley Council election
- 2003 Corby Borough Council election
- 2003 Craven Council election
- 2003 Dacorum Council election
- 2003 Daventry Council election
- 2003 Derby Council election
- 2003 Eastleigh Council election
- 2003 Ellesmere Port and Neston Council election
- 2003 Epping Forest Council election
- 2003 Fylde Council election
- 2003 Gateshead Council election
- 2003 Harlow Council election
- 2003 Hart Council election
- 2003 Hinckley and Bosworth Council election
- 2003 Hull Council election
- 2003 Hyndburn Council election
- 2003 Ipswich Borough Council election
- 2003 Kettering Borough Council election
- 2003 Knowsley Council election
- 2003 Leeds Council election
- 2003 Lincoln Council election
- 2003 Liverpool Council election
- 2003 Mole Valley Council election
- 2003 Newcastle-under-Lyme Council election
- 2003 North Lincolnshire Council election
- 2003 North Tyneside Council election
- 2003 Northampton Council election
- 2003 Penwith Council election
- 2003 Portsmouth Council election
- 2003 Preston Council election
- 2003 Purbeck Council election
- 2003 Redditch Council election
- 2003 Restormel Council election
- 2003 Rochdale Council election
- 2003 Rochford Council election
- 2003 Rossendale Council election
- 2003 Rugby Council election
- 2003 Runnymede Council election
- 2003 Rushmoor Council election
- 2003 Ryedale Council election
- 2003 Salford Council election
- 2003 Scarborough Council election
- 2003 Sedgefield Council election
- 2003 Sedgemoor Council election
- 2003 Sefton Council election
- 2003 Sheffield Council election
- 2003 Solihull Council election
- 2003 South Gloucestershire Council election
- 2003 South Lakeland Council election
- 2003 South Oxfordshire Council election
- 2003 South Ribble Council election
- 2003 South Tyneside Council election
- 2003 Southend-on-Sea Council election
- 2003 St Albans Council election
- 2003 St Helens Council election
- 2003 Stafford Borough Council election
- 2003 Stevenage Council election
- 2003 Stratford-on-Avon Council election
- 2003 Swindon Council election
- 2003 Tamworth Council election
- 2003 Tandridge Council election
- 2003 Three Rivers Council election
- 2003 Trafford Council election
- 2003 Tunbridge Wells Council election
- 2003 Tynedale Council election
- 2003 Vale of White Horse Council election
- 2003 Wakefield Council election
- 2003 Watford Council election
- 2003 Waveney Council election
- 2003 Welwyn Hatfield Council election
- 2003 West Lancashire Council election
- 2003 West Lindsey Council election
- 2003 West Wiltshire Council election
- 2003 Weymouth and Portland Council election
- 2003 Wigan Council election
- 2003 Winchester Council election
- 2003 Windsor and Maidenhead Council election
- 2003 Wirral Council election
- 2003 Woking Council election
- 2003 Wokingham Council election
- 2003 Wolverhampton Council election
- 2003 Worcester Council election
- 2003 Worthing Council election
- 2003 Wyre Forest Council election
- 2003 York Council election
Scottish local
- 2003 Glasgow City Council election
- 2003 North Lanarkshire Council election
- 2003 South Lanarkshire Council election
- 2003 Highland Council election
North America
- 2003 Belizean municipal elections
- 2003 Belizean legislative election
- 2003 Guatemalan general election
- 2003 Salvadoran legislative election
Canada
- Brigham municipal election
- 2003 Liberal Party of Canada leadership election
- 2003 Manitoba general election
- 2003 New Brunswick general election
- 2003 New Democratic Party leadership election
- New Democratic Party of Prince Edward Island candidates in the 2003 Prince Edward Island provincial election
- 2003 Newfoundland and Labrador general election
- 2003 Northwest Territories general election
- 2003 Nova Scotia general election
- 2003 Ontario general election
- 2003 Prince Edward Island Liberal Party leadership election
- 2003 Prince Edward Island general election
- 2003 Progressive Conservative leadership convention
- 2003 Quebec general election
- 2003 Quebec municipal elections
- 2003 Saskatchewan general election
Ontario municipal
- 2003 Ontario municipal elections
- 2003 Brantford municipal election
- 2003 Greater Sudbury municipal election
- 2003 Guelph municipal election
- 2003 Hamilton, Ontario municipal election
- 2003 Norfolk County municipal election
- 2003 Oakville municipal election
- 2003 Ottawa municipal election
- 2003 Peterborough municipal election
- 2003 St. Catharines municipal election
- 2003 Toronto municipal election
- 2003 Vaughan municipal election
Caribbean
- 2003 Barbadian general election
- 2003 Bermudian general election
- 2003 British Virgin Islands general election
- 2003 Cuban parliamentary election
- 2003 Grenadian general election
- 2003 Trinidadian local elections
- 2003 Turks and Caicos Islands general election
Mexico
- 2003 Mexican elections
- 2003 Colima state election
- 2003 Mexican legislative election
- 2003 Nuevo León state election
United States
United States gubernatorial
United States mayoral
- 2003 Charlotte mayoral election
- 2003 Houston mayoral election
- 2003 Jacksonville mayoral election
- 2003 Philadelphia mayoral election
- 2003 Raleigh mayoral election
- 2003 San Francisco mayoral election
Oceania
- 2003 Arutanga by-election
- 2003 Kiribati parliamentary election
- July 2003 Kiribati presidential election
- 2003 Marshall Islands general election
- 2003 Rua'au by-election