The Constitution Act or Constitutional Act is the name of several pieces of legislation including:

The Constitution of Australia The Constitution of New South Wales The Constitution of South Australia The Constitution of Victoria The Constitution of Tasmania The Constitution of Queensland Several acts forming part of the Constitution of Canada, such as: The Constitution Act, 1867, formerly called the British North America Act 1867 (30 & 31 Vict. c. 3) The Constitution Act, 1982 The Constitution Act (British Columbia) Constitutional Act 1791 (31 Geo. 3. c. 31), which divided Quebec into Upper Canada and Lower Canada for the benefit of newly arrived English-speakers Constitutional act of the Czech Republic, the name of a kind of law in the Czech Republic which alters the Constitution Various pieces of Danish legislation, including: Constitutional Act of the Kingdom of Denmark (1849), which provided the modern constitution for Denmark, ending the previous absolute monarchy The Danish Act of Succession, known formally as, The Constitutional Act of Denmark of June 5, 1953 Some laws in or formerly in the Constitution of New Zealand: New Zealand Constitution Act 1846 (9 & 10 Vict. c. 103) New Zealand Constitution Act 1852 (15 & 16 Vict. c. 72) The current Constitution Act 1986 Niue Constitution Act The Republic of South Africa Constitution Act, 1961; a former constitution active until 1983 in apartheid-era South Africa that established a republican form of government The Republic of South Africa Constitution Act, 1983; a former constitution active until 1994 in apartheid-era South Africa

See also Constitution Constitutional law (disambiguation)