Section 52 of the Constitution Act, 1867

Royal Proclamation which brought the Act into force on July 1, 1867

Section 52 of the Constitution Act, 1867 (French: article 52 de la Loi constitutionnelle de 1867) is a provision of the Constitution of Canada which gives the federal Parliament the power to increase the number of members in the House of Commons, provided any increase respects the principle of proportionate provincial representation in the House of Commons.

The Constitution Act, 1867 is the constitutional statute which established Canada. Originally named the British North America Act, 1867, the Act continues to be the foundational statute for the Constitution of Canada, although it has been amended many times since 1867. It is now recognised as part of the supreme law of Canada.