The 1872 Canadian federal election was held from July 20 to October 12, 1872, to elect members of the House of Commons of Canada of the 2nd Parliament of Canada. Prime Minister Sir John A. Macdonald's Conservative Party remained in power, defeating the Liberals. However, the Liberals increased their parliamentary representation considerably, while the Conservative seat count remained static, giving them only six more seats than the Liberals. The election produced the country's first minority government. The support of two independent Conservative MPs functionally gave Macdonald an extremely slim majority that allowed it to survive for two years, until it fell due to scandal.

The 2nd Canadian Parliament was in session from March 5, 1873, until January 2, 1874. The membership was set by the 1872 federal election from July 20 to October 12, 1872, and it changed only somewhat due to resignations and by-elections until it was dissolved prior to the 1874 election. Among the by-elections were the first election of PEI MPs, PEI joining Confederation in 1873.