Constitution Act
- 31 Geo. 3
- Act of Succession (Denmark)
- Constitution
- Constitution Act (British Columbia)
- Constitution Act 1986
- Constitution Act, 1867
- Constitution Act, 1982
- Constitution of Australia
- Constitution of Canada
- Constitution of New South Wales
- Constitution of New Zealand
- Constitution of Queensland
- Constitution of South Australia
- Constitution of Tasmania
- Constitution of Victoria
- Constitutional Act 1791
- Constitutional Act of the Kingdom of Denmark
- Constitutional act of the Czech Republic
- Constitutional law (disambiguation)
- New Zealand Constitution Act 1846
- New Zealand Constitution Act 1852
- Niue Constitution Act
- Republic of South Africa Constitution Act, 1961
- Republic of South Africa Constitution Act, 1983