| Naleemiah Institute of Islamic Studies, Society (Incorporation) Act, No. 34 of 1982 | |
| Naming of Streets and the Control of the Erection of Monuments Law, No. 4 of 1975 | |
| Nation Builders Association (Incorporation) Act, No. 49 of 1982 | |
Nation Building Tax
3/2020 : Nation Building Tax (Amendment) Not updated
20/2019 : Nation Building Tax (Amendment) Not updated
20/2018 : Nation Building Tax (Amendment) Not updated
13/2017 : Nation Building Tax (Amendment) Not updated
22/2016 : Nation Building Tax (Amendment) Not updated
12/2015 : Nation Building Tax (Amendment) Not updated
10/2014 : Nation Building Tax (Amendment) Not updated
11/2013 : Nation Building Tax (Amendment) Not updated
10/2011 : Nation Building Tax (Amendment) Not updated
32/2009 : Nation Building Tax (Amendment) Not updated
9/2012 : Nation Building Tax (Amendment) Not updated | |
| National Academy of Sciences of Sri Lanka (Incorporation) Act, No. 66 of 1988 | |
| National Apprenticeship Act (Repealed) | |
National Aquaculture Development Authority of Sri Lanka Act, No. 53 of 1998
23/2006 : National Aquaculture Development Authority of Sri Lanka (Amendment) Updated | |
| National Aquatic Resources Research and Development Agency Act, No. 54 of 1981 | |
| National Archives Law | |
| National Arts Council, Mahanuwara (Incorporation) Act | |
National Authority on Teacher Education Act, No. 32 of 1997
8/2015 : National Authority on Teacher Education (Repeal) Not updated | |
National Authority on Tobacco and Alcohol
3/2015 : National Authority on Tobacco and Alcohol (Amendment) not updated | |
| National Audit Act, No. 19 of 2018 | |
| National Child Protection Authority Act, No. 50 of 1998 | |
| National Council for Mal Health-‘ Sahanaya’ (Incorporation) Act, No. 11 of 1986 | |
| National Council of the Young Men’s Christian Associations of Ceylon (Incorporation) Act | |
| National Crafts Council and Allied Institutions Act, No. 35 of 1982 | |
| National Dangerous Drugs Control Board Act, No. 11 of 1984 | |
National Defence Fund Act, No.9 of 1985
16/2018 : National Defence Fund (Amendment) Not updated | |
| National Development Bank of Sri Lanka Act | |
| National Development Loan (1945) Ordinance | |
| National Development Loan (1950) Act | |
| National Education Commission Act, No. 19 of 1991 | |
National Enterprise Development Authority Act, No. 17 of 2006
National Enterprise Development Authority (Amendment) Act Not updated | |
| National Environmental Act | |
| National Environmental Act, No. 47 of 1980 | |
| National Eye Bank Trust of Sri Lanka | |
| National Film Corporation of Sri Lanka Act | |
| National Film Corporation Trust fro Film Artistes Technicians Act, No 3 of 1986 | |
| National Freedom from Hunger Campaign Law | |
| National Gem and Jewellery Authority Act, No. 50 of 1993 | |
| National Health Development Fund Act, No. 13 of 1981 | |
| National Heritage Wilderness Areas Act, No. 3 of 1988 | |
| National Housing Act | |
| National Housing Development Authority Act | |
| National Housing Development Authority (Special Provisions) Act | |
| National Human Resources Development Council of Sri Lanka Act, No. 18 of 1997 | |
| National Hydrographic Act No 7 of 2024 | |
| National Innovation Agency Act No 22 of 2019 | |
National Institute of Business Management Law
2/2014 : National Institute of Business Management (Amendment) Not updated | |
| National Institute of Cooperative Development (Incorporation) Act, No. 1 of 2001 | |
| National Institute of Education Act, No. 28 of 1985 | |
| National Institute of Fisheries and Nautical Engineering Act, No. 36 of 1999 | |
| National Institute of Labour Studies Act, No.12 of 2010 | |
| National Institute of Language Education and Training Act, No. 26 of 2007 | |
| National Institute of Occupational Safety and Health Act, No. 38 of 2009 | |
| National Institute of Plantation Management Act | |
| National Institute of Social Development Act, No. 41 of 1992 | |
| National Institute of Technical Education of Sri Lanka Act, No. 59 of 1998 | |
National Insurance Trust Fund Act, No. 28 of 2006
28/2007 : National Insurance Trust Fund (Amendment) Not updated | |
| National Kidney Foundation of Sri Lanka (Incorporation) Act, No.34 of 2006 | |
| National Library and Documentation Services Board Act, No. 51 of 1998 | |
| National Loan Ordinance | |
| National Lotteries Board Act | |
| National Minimum Wage of Workers Act | |
| National Medicines Regulatory Authority Act No 5 of 2015 | |
| National Metric Conversion Law | |
| National Museums Ordinance | |
| National Planning Council Act | |
| National Police Academy Act, No. 44 of 2011 | |
| National Prices Commission Law | |
| National Research Council of Sri Lanka Act, No. 11 of 2018 | |
| National Savings Bank Act | |
| National Science Council of Sri Lanka Law | |
| National Security Act No, 52 of 1991 | |
| National Security Levy (Amendment) Act, No. 11 of 1996 | |
| National Thoroughfares Act no 40 of 2008 | |
National Transport Commission Act, No, 37 of 1991
6/2017 : National Transport Commission (Amendment) No updated | |
| National Transport Medical Institute Act, No. 25 of 1997 | |
| National Water Supply and Drainage Board Law | |
| National Youth Hostel Association of Sri Lanka (Incorporation) Act, No. 11 of 1991 | |
| National Youth Services Act | |
| National Zoological Gardens Act, No. 41 of 1982 | |
| National, Economic, Social, Educational and Cultural Foundation of Sri Lanka (incorporation) Act, No. 38 of 1991 | |
| Natural Resources, Energy and Science Authority of Sri Lanka Act, No. 78 of 1981 | |
| Naval and Victualling Stores Ordinance | |
| Navodaya Foundation (Incorporation) Act, No. 16 of 1999 | |
Navy Act
32/2011 : Navy (Amendment) Not updated | |
| Navy and Air Force (Amendment) Act, No. 21 of 1979 | |
| Nawalapitiya Dharul Uloom Al Hashimiya Arabic College (Incorporation) Act, No 33 of 2006 | |
| Negombo Municipal Council (Differential Rates) Act | |
| New Villages Development Authority for Plantation Region Act, No. 32 of 2018 | |
| New St. Andrew’s Church Ordinance | |
| New Young Men’s short title. Christian Association, Moratuwa (Incorporation) Act. No. 26 of 1992 | |
| Newspapers Ordinance | |
| Nimal Siripala De Silva Foundation (Incorporation) | |
| Nindagama Lands Act | |
| Non-Episcopalian Churches Ordinance | |
| North Lanka College of Medical Practitioners (Incorporation) Act, No. 45 of 1988 | |
| Northern Province Markets Ordinance | |
| Northern Province Teachers’ Association Benevolent Fund (Incorporation) Act | |
| Notaries Ordinance | |
| Nugawela Malagamma Rajamaha Vihara Sanwardhana Sabhawa (Incorporation) Act, No. 56 of 1992 | |
| Nugegoda Young Men’s Buddhist Association Ordinance | |
| Nuisances Ordinance | |
| Nursing Homes (Regulation) Act | |
| Nutrition Society of Sri Lanka (Incorporation) Act, No.. 5 of 1985 | |
