By-elections to the 30th Canadian Parliament were held to fill vacancies in the House of Commons of Canada between the 1974 federal election and the 1979 federal election. The Liberal Party of Canada led a majority government for the entirety of the 30th Canadian Parliament, though their number did decrease from by-elections.
27 seats became vacant during the life of the Parliament. 25 of these vacancies were filled through by-elections, and 2 seats remained vacant when the 1979 federal election was called.
A by-election, also known as a special election in the United States and the Philippines, a bye-election in Ireland, and a bypoll in India, is an election used to fill an office that has become vacant between general elections.
In politics, a casual vacancy is a situation in which a seat in a deliberative assembly becomes vacant during that assembly's term. Casual vacancies may arise through the death, resignation or disqualification of the sitting member, or for other reasons.
By-elections to the 38th Canadian Parliament were held to fill vacancies in the House of Commons of Canada between the 2004 federal election and the 2006 federal election. The Liberal Party of Canada led a minority government for the entirety of the 38th Canadian Parliament.
By-elections to the 40th Canadian Parliament were held to fill vacancies in the House of Commons of Canada between the 2008 federal election and the 2011 federal election. The Conservative Party of Canada led a minority government for the entirety of the 40th Canadian Parliament, with little change from by-elections.
By-elections to the 36th Canadian Parliament were held to fill vacancies in the House of Commons of Canada between the 1997 federal election and the 2000 federal election. The Liberal Party of Canada led a majority government for the entirety of the 36th Canadian Parliament, with increases from by-elections.
By-elections to the 35th Canadian Parliament were held to fill vacancies in the House of Commons of Canada between the 1993 federal election and the 1997 federal election. The Liberal Party of Canada led a majority government for the entirety of the 35th Canadian Parliament, with little change from by-elections.
By-elections to the 34th Canadian Parliament were held to fill vacancies in the House of Commons of Canada between the 1988 federal election and the 1993 federal election. The Progressive Conservative Party of Canada led a majority government for the entirety of the 34th Canadian Parliament, though their number did decrease from by-elections.
By-elections to the 33rd Canadian Parliament were held to fill vacancies in the House of Commons of Canada between the 1984 federal election and the 1988 federal election. The Progressive Conservative Party of Canada led a majority government for the entirety of the 33rd Canadian Parliament, though their number did decrease from by-elections.
By-elections to the 32nd Canadian Parliament were held to fill vacancies in the House of Commons of Canada between the 1980 federal election and the 1984 federal election. The Liberal Party of Canada led a majority government for the entirety of the 32nd Canadian Parliament, though their number did decrease from by-elections.
By-elections to the 31st Canadian Parliament were held to fill vacancies in the House of Commons of Canada between the 1979 federal election and the 1980 federal election. The Progressive Conservative Party of Canada led a minority government for the entirety of the 31st Canadian Parliament.
By-elections to the 28th Canadian Parliament were held to fill vacancies in the House of Commons of Canada between the 1968 federal election and the 1972 federal election. The Liberal Party of Canada led a majority government for the entirety of the 29th Canadian Parliament, though their number did decrease from by-elections.
By-elections to the 27th Canadian Parliament were held to fill vacancies in the House of Commons of Canada between the 1965 federal election and the 1968 federal election. The Liberal Party of Canada led a minority government for the entirety of the 27th Canadian Parliament, with little change from by-elections.
By-elections to the 26th Canadian Parliament were held to fill vacancies in the House of Commons of Canada between the 1963 federal election and the 1965 federal election. The Liberal Party of Canada led a minority government for the entirety of the 26th Canadian Parliament, with no change from by-elections.
By-elections to the 24th Canadian Parliament were held to fill vacancies in the House of Commons of Canada between the 1958 federal election and the 1962 federal election. The Progressive Conservative Party of Canada led a majority government for the 24th Canadian Parliament.
By-elections to the 23rd Canadian Parliament were held to fill vacancies in the House of Commons of Canada between the 1957 federal election and the 1958 federal election. The Progressive Conservative Party of Canada led a minority government for the 23rd Canadian Parliament.
By-elections to the 22nd Canadian Parliament were held to fill vacancies in the House of Commons of Canada between the 1953 federal election and the 1957 federal election. The Liberal Party of Canada led a majority government for the 22nd Canadian Parliament.
By-elections to the 21st Canadian Parliament were held to fill vacancies in the House of Commons of Canada between the 1949 federal election and the 1953 federal election. The Liberal Party of Canada led a majority government for the 21st Canadian Parliament.
By-elections to the 20th Canadian Parliament were held to fill vacancies in the House of Commons of Canada between the 1945 federal election and the 1949 federal election. The Liberal Party of Canada led a working majority government for the 20th Canadian Parliament, though was technically a minority government during World War II.
By-elections to the 19th Canadian Parliament were held to fill vacancies in the House of Commons of Canada between the 1940 federal election and the 1945 federal election. The Liberal Party of Canada led a majority government for the 19th Canadian Parliament.
By-elections to the 18th Canadian Parliament were held to fill vacancies in the House of Commons of Canada between the 1935 federal election and the 1940 federal election. The Liberal Party of Canada led a majority government for the 18th Canadian Parliament.