Proclamation of the Constitution Act, 1867

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

The Proclamation of the Constitution Act, 1867 (French: Proclamation de la Loi constitutionnelle de 1867) was a royal proclamation issued by Queen Victoria on the advice of the British government, bringing the Constitution Act, 1867 into force and creating the new country of Canada, effective July 1, 1867.

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.