This local electoral calendar for 2018 lists the subnational elections held in 2018. Referendums, retention elections, and national by-elections (special elections) are also included.
January 5–6 January: Czech Republic, Trutnov, Senate by-election (1st round) 12–13 January: Czech Republic, Trutnov, Senate by-election (2nd round) 17 January: India, Madhya Pradesh, Municipal Councils 24 January: Mozambique, Nampula, Mayor by-election (1st round) 27 January: Nigeria, Osun, Local Government Councils and Chairmen 28 January: Austria, Lower Austria, Parliament France, Territoire de Belfort and Val-d'Oise, National Assembly by-elections (1st round) 29 January: India, Ajmer, Alwar and Uluberia, House of the People by-elections
February 4 February: France, Territoire de Belfort and Val-d'Oise, National Assembly by-elections Guinea, Japan Nagasaki, Governor Yamaguchi, Governor Montenegro, Municipal Assemblies 6 February: United Kingdom, Wales, Alyn and Deeside, National Assembly by-election 8 February: Australia, Lord Howe Island, Board 10 February: Nigeria, Kano, Local Government Councils and Chairmen Sri Lanka, Municipal Councils, Urban Councils and Divisional Councils 12 February: Pakistan, NA-154, National Assembly by-election 13 February: United States, Oklahoma City, Mayor 18 February: Belarus, Regional Councils, District Councils and Municipal Councils India, Tripura, Legislative Assembly 25 February: Austria, Tyrol, Parliament Germany, Frankfurt, 27 February: India Meghalaya, Legislative Assembly Nagaland, Legislative Assembly
March 3 March: Australia, Tasmania, House of Assembly Nigeria, Edo, Local Government Councils and Chairmen 4 March: Austria, Carinthia, Parliament El Salvador, France, French Guiana, National Assembly by-election (1st round) Italy Lazio, Regional Council Lombardy, Regional Council Serbia, Belgrade, City Assembly Switzerland Aargau, Appenzell Ausserrhoden, Basel-Landschaft, Basel-Stadt, referendums Bern, Fribourg, Glarus, Executive Council Jura, referendums Lucerne, Nidwalden, Executive Council and Landrat Obwalden, Executive Council (1st round) and Cantonal Council Schaffhausen, referendum Schwyz, St. Gallen, Valais, Vaud, referendum Zürich, Zürich City, 5 March: Jamaica, Saint Andrew North Western, House of Representatives by-election 7 March: Belize, City Councils and Town Councils Sierra Leone, District Chairs, District Councils, Mayors and Local Councils 11 March: Armenia, Mayors, Local Councils and Community Chiefs Cuba, Provincial Assemblies France French Guiana, National Assembly by-election (2nd round) Haute-Garonne, National Assembly by-election (1st round) Germany, Frankfurt, Hong Kong, Hong Kong Island, Kowloon West, New Territories East and Architectural, Surveying, Planning and Landscape, Legislative Council India, Araria, Gorakhpur and Phulpur, House of the People by-elections Japan, Ishikawa, Governor 12 March: India, Tripura, Charilam, Legislative Assembly state by-election 13 March: Bangladesh, Brahmanbaria-1 and Gaibandha-1, House of the Nation by-election United States, Pennsylvania's 18th congressional district, U.S. House of Representatives special election 14 March: Mozambique, Nampula, Mayor by-election (2nd round) 17 March: Australia Batman, House of Representatives by-election South Australia, House of Assembly and Legislative Council 18 March: France Haute-Garonne, National Assembly by-election (2nd round) Loiret and Mayotte, National Assembly by-elections (1st round) Mexico, Veracruz, Russia, Volgograd Oblast, 20 March: United States, Cook County, Legalize Marijuana referendum 21 March: Netherlands, Municipal Councils 24 March: United States, Louisiana, Circuit Courts of Appeal special election 25 March: France, Loiret and Mayotte, National Assembly by-elections (2nd round) Switzerland, Bern, and Grand Council Bernese Jura, Turkmenistan, District Councils and Municipal Councils 28 March: Namibia, Ncuncuni, National Assembly by-election 29 March: Bangladesh, Sub-district Councils and Union Councils, and Sub-district Council, Union Council and Ward by-elections 31 March: Sierra Leone, District Chairs, District Councils, Mayors and Local Councils
April 3 April: United States Anchorage, Mayor and Bathroom Bill referendum Wisconsin, Supreme Court and Court of Appeals, and Elimination of State Treasurer constitutional referendum 8 April: France, Overseas Residents, National Assembly by-election (1st round) Japan, Kyoto, Governor Switzerland, Obwalden, Executive Council (2nd round) 10 April: United States, Long Beach, Mayor and City Council (1st round) 12 April: The Gambia, Area Councils and City Councils 15 April: France, Wallis and Futuna, National Assembly by-election Germany, Thuringia, Switzerland, Geneva, and 16 April: India, Jharkhand, Municipal Corporations 20 April: India, Mizoram, Chakma Autonomous District, Council 22 April: Austria, Salzburg, Parliament France, Overseas Residents, National Assembly by-election (2nd round) Italy, Molise, Regional Council Paraguay, 23 April – 11 May: Australia, Melbourne, Lord Mayor by-election 24 April: United States, Arizona's 8th congressional district, U.S. House of Representatives special election 29 April: Italy, Friuli-Venezia Giulia, Regional Council, and Mayors and Municipal Councils Switzerland Appenzell Innerrhoden, Landsgemeinde Ticino, referendum Tunisia,
May 1 May: Canada, Nunatsiavut, Assembly 3 May: United Kingdom Borough Councils, Unitary Authority and Mayors Birmingham, City Council Leeds, City Council Liverpool, City Council (one third) London, Mayors and Borough Councils Manchester, City Council Sheffield City Region, Mayor West Tyrone, House of Commons by-election 5 May: Australia, Tasmania, (Hobart and Prosser) Legislative Council United States, Arlington, City Council 6 May: Germany, Schleswig-Holstein, Switzerland Geneva, Glarus, Tunisia, 8 May: United States, Ohio, Regulate Congressional Redistricting 9 May: Malaysia, state elections Johor, Legislative Assembly Kedah, Legislative Assembly Kelantan, Legislative Assembly Malacca, Legislative Assembly Negeri Sembilan, Legislative Assembly Pahang, Legislative Assembly Penang, Legislative Assembly Perak, Legislative Assembly Perlis, Legislative Assembly Sabah, Legislative Assembly Selangor, Legislative Assembly Terengganu, Legislative Assembly 12 May: The Gambia, Mayors India, Karnataka, Legislative Assembly Kuwait, Municipal Council Nigeria Kaduna, Local Government Councils and Chairmen Oyo, Local Government Councils and Chairmen 13 May: Italy, Friuli-Venezia Giulia, Mayors and Municipal Councils (2nd round) 14 May: India, West Bengal, District Councils, Township Councils and Village Councils Philippines, Ward Chairs, Ward Councils, Youth Chairs and Youth Councils 15 May: Bangladesh, Khulna, Mayor and City Corporation United States Idaho, Supreme Court and Court of Appeals Portland, City Commission (1st round) 18–19 May: Czech Republic, Zlín district 78, Senate (1st round) 20 May: Italy, Aosta Valley, Regional Council, Mayors and Municipal Councils Montenegro, Municipal Assemblies Tunisia, 22 May: United States Arkansas, Supreme Court and Court of Appeals Georgia, Supreme Court and Court of Appeals 23 May: Solomon Islands, Gizo/Kolombangara, National Parliament by-election 24 May: United States, Nashville, Mayor 25–26 May: Czech Republic, Zlín district 78, Senate (2nd round) 26 May: Iceland, Municipal Councils Nigeria, Nasarawa, Local Government Councils and Chairmen 27 May: Italy, Trentino-Alto Adige/Südtirol, Mayors and Municipal Councils Montenegro, Municipal Assemblies Podgorica, City Assembly 28 May: India, Bhandara–Gondiya, Kairana, Nagaland and Palghar, House of the People
June 3 June: Brazil, Tocantins, Governor by-election (1st round) 5 June: United States Fresno, City Council (1st round) Long Beach, City Council (2nd round) Los Angeles County, Board of Supervisors Orange County, CA, Board of Supervisors and District Attorney (1st round) Riverside County, Board of Supervisors (1st round) Sacramento, City Council San Bernardino County, Board of Supervisors San Diego County, Board of Supervisors (1st round) San Francisco, Mayor Santa Clara County, Board of Supervisors (1st round) San Jose, Mayor and City Council (1st round) 7 June: Bermuda, Warwick North East, House of Assembly by-election Canada, Ontario, Legislative Assembly 9 June: New Zealand, Northcote, House of Representatives by-election 10 June: Armenia, Mayors, Local Councils and Community Chiefs Italy, Mayors and Municipal Councils (1st round) Japan, Niigata, Governor Switzerland Basel-Landschaft, Basel-Stadt, referendums Fribourg, Geneva, referendums Glarus, Landrat Grisons, Executive Council and Grand Council (1st round) Jura, referendums Lucerne, Nidwalden, referendum Schaffhausen, referendums Schwyz, Solothurn, St. Gallen, Valais, referendum Zug, Zürich, 12 June: United States, Maine, Ranked-Choice Voting referendum 13 June: South Korea, Busan Haeundae B, Cheonan A, Cheonan C, Gimcheon, Gimhae B, Gwangju Seo A, Incheon Namdong A, Jecheon–Danyang, Seoul Nowon C, Seoul Songpa B, Ulsan Buk and Yeongam–Muan–Sinan, National Assembly by-elections Governors, Provincial Councils, Mayors, Municipal Councils and School Boards Busan, Incheon, Seoul, Mayor 14 June: United Kingdom, Lewisham East, House of Commons by-election 16 June: Nigeria, Rivers, Local Government Councils and Chairmen 18 June: Canada, Chicoutimi—Le Fjord, House of Commons by-election 19 June: United States, Washington, D.C., Minimum Wage Parity for Tipped Workers referendum 24 June: Armenia, Mayors, Local Councils and Community Chiefs Brazil, Tocantins, Governor by-election (2nd round) Italy, Mayors and Municipal Councils (2nd round) Japan, Shiga, Governor Northern Cyprus, 26 June: Bangladesh, Bagerhat-3, House of the Nation by-election 27 June: Bangladesh, Gazipur, Mayor and City Corporation Indonesia, Governors, Regents and Mayors 30 June: Canada, Mohawk Council of Akwesasne United States, Texas's 27th congressional district, U.S. House of Representatives
July 1 July: Mexico, State elections Aguascalientes, Baja California Sur, Campeche, Chiapas, Chihuahua, Coahuila, Colima, Durango, Guanajuato, Guerrero, Hidalgo, Jalisco, Mexico City, Mexico State, Michoacán, Morelos, Nuevo León, Oaxaca, Puebla, Querétaro, Quintana Roo, San Luis Potosí, Sinaloa, Sonora, Tabasco, Tamaulipas, Tlaxcala, Veracruz, Yucatán, Zacatecas, Switzerland, Grisons, Grand Council (2nd round) 10 July: Uganda, County Councils and Parish Councils 14 July: Nigeria, Ekiti, Governor 25 July: Bangladesh, Kurigram-3, House of the Nation by-election Pakistan Balochistan, Provincial Assembly Khyber Pakhtunkhwa, Provincial Assembly Punjab, Provincial Assembly Sindh, Provincial Assembly 26 July: Zambia, Lusaka, Mayor 28 July: Australia, Braddon, Fremantle, Longman, Mayo and Perth, House of Representatives by-elections 30 July: Bangladesh Barisal, Mayor and City Corporation Rajshahi, Mayor and City Corporation Sylhet, Mayor and City Corporation Zimbabwe, Urban Councils, District Councils and Ward Councils 31 July: Liberia, Bong and Montserrado, Senate by-elections
August 5 August: Japan, Nagano, Governor 7 August: United States Ohio's 12th congressional district, U.S. House of Representatives special election Missouri, Right to Work Repeal referendum 11 August: Nigeria Katsina North and Bauchi South, Senate by-elections Lokoja, House of Representatives by-election United States, Honolulu, City Council (1st round) 15 August: Uganda, Arua, Parliament by-election 17 August: Kenya, Baringo South, National Assembly by-election 25 August: Nigeria, Imo, Local Government Councils and Chairmen 26 August: Japan, Kagawa, Governor 27 August: India, Ladakh, Kargil District, Ladakh Autonomous Hill Development Council 28 August: United States Mesa, City Council (1st round) Miami-Dade County, County Commission