February

• 4 February: Provincial by-election in Toronto Centre
  Toronto Centre (provincial electoral district)
  Toronto Centre is a provincial electoral district in Toronto, Ontario, Canada. It elects one member to the Legislative Assembly of Ontario.It was created in 1999 as Toronto Centre—Rosedale from most of St. George—St. David and parts of St. Andrew—St...
  
  

March

• 2 March: Provincial by-election in Concordia
  Concordia (electoral district)
  Concordia is a provincial electoral division in the Canadian province of Manitoba. It is located in the northeastern part of the city of Winnipeg....
  
  , Manitoba
• 4 March: Provincial by-elections in Ottawa West—Nepean
  Ottawa West—Nepean (provincial electoral district)
  Ottawa West—Nepean is a provincial electoral district in eastern Ontario, Canada. It elects one member to the Legislative Assembly of Ontario.The riding has been represented in the Ontario legislature by Liberal Bob Chiarelli since 2010....
  
   and Leeds—Grenville, Ontario

July

• 5 July: Provincial by-election
  Quebec provincial by-elections, 2010
  Three provincial by-elections were held in Quebec in 2010 to fill vacancies in the National Assembly.-Vachon:The district of Vachon was vacated by Parti Québécois MNA Camil Bouchard on January 6, 2010. The by-election took place on July 5, 2010...
  
   in Vachon
  Vachon (electoral district)
  Vachon is a provincial electoral district in Quebec, Canada that elects members to the National Assembly of Quebec. The district is located in Longueuil and includes most of the borough of Saint-Hubert...
  
  , Quebec

September

• 13 September: Provincial by-election
  Quebec provincial by-elections, 2010
  Three provincial by-elections were held in Quebec in 2010 to fill vacancies in the National Assembly.-Vachon:The district of Vachon was vacated by Parti Québécois MNA Camil Bouchard on January 6, 2010. The by-election took place on July 5, 2010...
  
   in Saint-Laurent
  Saint-Laurent (provincial electoral district)
  Saint-Laurent is a provincial electoral district in Quebec, Canada that elects members to the National Assembly of Quebec. The district is located in Montreal...
  
  , Quebec
• 27 September: New Brunswick general election, 2010

October

• 2 October: Prince Edward Island Progressive Conservative Party leadership election, 2010
• 18 October: Alberta municipal elections, 2010
  Alberta municipal elections, 2010
  Municipal elections were held in Alberta, Canada on Monday, October 18, 2010. Since 1968, provincial legislation has required every municipality to hold triennial elections...
  
  
• 25 October: Ontario municipal elections, 2010
  Ontario municipal elections, 2010
  The 2010 municipal elections in Ontario were held on October 25, 2010.Voters in the province of Ontario elected mayors, councillors, school board trustees and all other elected officials in all of the province's municipalities....
  
  
• 27 October: Manitoba municipal elections, 2010
  Manitoba municipal elections, 2010
  The Canadian province of Manitoba held municipal elections on October 27, 2010. Election day was on July 23, 2010 for several beach resorts including Winnipeg Beach, Dunnottar and Victoria Beach. Mayors, councillors, and school board trustees were elected....
  
  

November

• 1 November: Prince Edward Island municipal elections, 2010, in Charlottetown, Cornwall
  Cornwall, Prince Edward Island
  Cornwall is a Canadian suburban town located in Queens County, Prince Edward Island.The town is located immediately west of the provincial capital Charlottetown and functions as a bedroom community.-History:...
  
  , Stratford
  Stratford, Prince Edward Island
  Stratford is a Canadian suburban town located in central Prince Edward Island.It is situated on a peninsula formed by the Hillsborough River estuary, Charlottetown Harbour, and Hillsborough Bay - a sub-basin of the Northumberland Strait....
  
   and Summerside
  Summerside, Prince Edward Island
  Summerside is a Canadian city in Prince County, Prince Edward Island. It is the second largest city in the province and the principal municipality for the western part of the island.- History :...
  
  
• 3 November: Saskatchewan municipal elections for odd-numbered rural municipalities
• 29 November: Provincial by-election in Kamouraska-Témiscouata
  Kamouraska-Témiscouata
  Kamouraska-Témiscouata is a provincial electoral district in Quebec, Canada that elects members to the National Assembly of Quebec. The riding was created in 1972 from Kamouraska and parts of L'Islet and Témiscouata...
  
  , Quebec
  Quebec
  Quebec or is a province in east-central Canada. It is the only Canadian province with a predominantly French-speaking population and the only one whose sole official language is French at the provincial level....
  
  
• 29 November: Canadian federal by-elections, 2010

December

• 2 December: Provincial by-election in Conception Bay East - Bell Island, Newfoundland and Labrador
• 6 December: Nunavut municipal elections, 2010 (hamlets)
• 13 December: Mayoral by-election in Iqaluit, Nunavut
  Nunavut
  Nunavut is the largest and newest federal territory of Canada; it was separated officially from the Northwest Territories on April 1, 1999, via the Nunavut Act and the Nunavut Land Claims Agreement Act, though the actual boundaries had been established in 1993...
  
  
• 13 December: Northwest Territories municipal elections, 2010 (hamlets)
• 13 December: Territorial by-election in Whitehorse Centre
  Whitehorse Centre
  Whitehorse Centre is an electoral district which returns a member to the Legislative Assembly of the Yukon Territory in Canada.The current MLA is Elizabeth Hanson, who is the leader of the Yukon New Democratic Party....
  
  , Yukon