| Abdul Majeed Mohamed Sahabdeen Trust Foundation (Incorporation) Act | 25 January 1991 |
| Abolition of Fideicommissa and Entails Act | 12 May 1972 |
| Abolition of Slavery Ordinance | 20 December 1844 |
| Active Liability Management Act | 25 April 2018 |
| Administration of Justice Law | 14 November 1973 |
| Administrative Appeals Tribunal Act | 25 March 2002 |
| Administrative Districts Act | 14 April 1955 |
| Admiralty Jurisdiction Act | 12 October 1983 |
| Admiralty Lands Ordinance | 29 September 1862 |
| Adoption of Children Ordinance | 01 February 1941 |
| Adoption of Roman-Dutch Ordinance | 23 September 1799 |
| Affidavits Act | 25 April 1953 |
| Aganuwara Taruna Kavi Samajaya (Incorporation) Act | 03 September 1985 |
| Age of Majority Ordinance | 20 October 1865 |
| Agrarian Development Act | 18 August 2000 |
| Agricultural and Agrarian Insurance Act | 16 July 1999 |
| Agricultural Corps Ordinance | 24 February 1946 |
| Agricultural Produce (Grading and Marking) Ordinance | 26 April 1940 |
| Agricultural Produce Agents (Registration) Ordinance | 11 August 1941 |
| Agricultural Products (Guaranteed Prices and Control of Hulling and Milling) Act | 02 June 1961 |
| Agricultural Products (Regulation) Ordinance | 01 October 1939 |
| Air Ceylon Act | 15 March 1951 |
| Air Force Act | 10 October 1949 |
| Air Navigation (Special Provisions) Act | 06 November 1992 |
| Air Navigation Act | 18 May 1950 |
| Aiyenayaka Devala Development Mudiyanse Tennakoon Foundation (Incorporation) Act | 21 July 2003 |
| Al Haj Abdul Jawad Alim Valiyullah Trust (Incorporation) | 09 September 2009 |
| Al-Haj N M Buhardeen Foundation (Incorporation) Act | 31 August 1992 |
| Al Haj S. M. M. Hussain Charitable Trust (Incorporation) | 23 December 2009 |
| Alakolamada Sri Jayasumanarama Maha Vihara Dayaka Sabha (Incorporation) Act | 31 March 1993 |
| All Ceylon Buddhist Congress Act | 16 April 1955 |
| All Ceylon Buddhist Students’ Federation (Incorporation) Law | 05 December 1975 |
| All Ceylon Jemmiyathul Ulama (Incorporation) Act | 18 August 2000 |
| All Ceylon Muslim Women’s Association (Incorporation) Act | 12 October 1982 |
| All Ceylon Sri Sumangala Social Services and Welfare Association (Incorporation) Act | 22 September 1993 |
| All Ceylon Telugu Congress (Incorporation) Act | 25 March 1992 |
| All Ceylon Union of Muslim League Youth Fronts (Incorporation) Act | 07 October 1998 |
| All Ceylon Young Men’s Muslim Association Conference (Incorporation) Act | 22 June 1968 |
| Allowances to Plantation Workers Act | 19 November 1981 |
| Amaradeva Aesthetic And Research Centre Act | 07 September 2018 |
| Ambagahapelessa Sri Sangabodhi Sasanodaya Samithiya (Incorporation) Act | 16 July 1993 |
| Ambalangoda Delduwa Vivekarama Aranya Senasana Dayaka Sabha (Incorporation) Act | 17 December 1991 |
| Ambalangoda Deshapremi Sanvidhanaya (Incorporation) Act | 21 October 1992 |
| Ambuluwawa Dissanayake Mudiyanselage Jayaratne Religious Centre and Bio-Diversity Complex Trust Fund Act | 21 August 2009 |
| American Ceylon Mission Ordinance | 22 September 1908 |
| Ampara Senanayake Gunanusmarana Sabhawa (Incorporation) Act | 13 March 1998 |
| Animal Diseases Act | 13 November 1992 |
| Animal Feed Act | 20 June 1986 |
| Animals Act | 20 August 1958 |
| Anti-Corruption Act | 22 November 2023 |
| Anti-Dumping and Countervailing Duties Act | 23 March 2018 |
| Antiquities Ordinance | 15 July 1940 |
| Anula Vidyalaya Ordinance | 19 February 1944 |
| Anuradhapura Buddhist Association Act | 08 March 1952 |
| Anuradhapura Jaya Sri Maha Bodhi Development Fund (Incorporation) Act | 06 November 2006 |
| Anuradhapura Mahapothana Konwewa Sama Deepa Samaja Kendraya (Incorporation) Act | 31 March 1992 |
| Anuradhapura Sri Pushpadana Development Foundation (Incorporation) Act | 22 August 2011 |
| Apartment Ownership (Special Provisions) Act | 17 August 2018 |
| Apartment Ownership Law | 20 March 1973 |
| Api Wenuwen Api Fund Ordinance | 19 February 2008 |
| Arbitration Act | 30 June 1995 |
| Archaeological Sites of National Importance Act | 20 April 1990 |
| Army Act | 20 October 1949 |
| Arts Council of Ceylon Act | 24 March 1952 |
| Asian Buddhist Congress (Incorporation) Act | 21 April 1993 |
| Asian Development Bank Agreement (Ratification) Act | 24 September 1966 |
| Asian Infrastructure Investment Bank Agreement (Ratification) Act | 07 July 2016 |
| Assemblies of God of Ceylon Ordinance | 02 July 1947 |
| Assignment of Ministers’ Functions Act | 30 July 1953 |
| Assistance to and Protection of Crime and Witnesses Act | 07 March 2015 |
| ASSISTANCE TO AND PROTECTION OF VICTIMS OF CRIME AND WITNESSES ACT | 22 November 2023 |
| Assisted Schools and Training Colleges (Special Provisions) Act | 21 July 1960 |
| Assisted Schools and Training Colleges (Supplementary Provisions) Act | 01 December 1961 |
| Associated Newspapers of Ceylon Ltd (Special Provisions) Law | 20 July 1973 |
| Association of Consulting Engineers, Sri Lanka (Incorporation) Act | 15 December 2003 |
| Astrologers’ Association of Sri Lanka (Incorporation) Act | 10 December 1997 |
| Atomic Energy Authority Act | 25 June 1969 |
| Attanagalla Development Foundation (Incorporation) Act | 15 July 2008 |
| Auctioneers and Brokers Ordinance | 31 October 1889 |
| Auditor-General’s Fees Act | 19 July 1958 |
| Automobile Association of Ceylon (Incorporation) Act | 28 March 1957 |
Ayurveda Act
19/2023 : Ayurveda (Amendment) Not Updated | 01 October 1977 |
