- Narcotics Safety Awareness Act, S.O. 2010, c. 22
- Gélinas, 818
- Natural disasters. see also Emergency Management Ontario (EMO)
- floods
- tornadoes
- Goderich
- Cansfield, 2020
- Goderich
- Natural resources management
- reforms made in Ontario 2012 budget
- Gravelle, 2349–2350
- reforms made in Ontario 2012 budget
- NDP
- Prue, 2141
- Neuroscience research
- New Drivers’ Insurance Rate Reduction Act, 2012 (Bill 71)
- Niagara Escarpment
- land conservation. see also Aggregate resources management—Niagara Escarpment
- Niagara Falls
- tightrope walk
- Chan, 2379
- tightrope walk
- Noise pollution
- Canada-United States border communities
- Piruzza, 1507
- Canada-United States border communities
- Non-Profit Housing Co-operatives Statute Law Amendment Act, 2012 (Bill 65)
- Non-profit organizations
- Meals on Wheels
- Prue, 254–255
- Meals on Wheels
- Northern Ontario. see also Committees—Legislative committees—to review policies that impact northern Ontario; Energy rates; Mineral processing industry—job losses; Mining industry; Northern Ontario Heritage Fund Corporation (NOHFC); Northern Ontario, land development; Ontario Northland Transportation Commission (ONTC)
- Bisson, 1759, 1888, 3455–3456
- Campbell, 817, 3324
- Fedeli, 817
- Horwath, 815, 816
- Hudak, 1343
- Mantha, 818
- Sandals, 814
- Vanthof, 596, 812, 813, 819, 1703
- campgrounds/camping, closure
- Bisson, 4096
- children's services
- economic decline
- Walker, 2354
- economic development
- education
- grants
- job creation
- land development. see Northern Ontario, land development
- Northern Policy Institute
- resource development
- Fedeli, 3623
- transportation
- Northern Ontario Heritage Fund Corporation (NOHFC)
- Northern Ontario, land development
- Northern Ontario School of Medicine (NOSM)
- government funding
- McGuinty, 1400
- government funding
- Nuclear energy. see also Security measures—in electricity generating facilities
- Nuclear generating stations. see also Ontario Power Authority (OPA); Ontario Power Generation (OPG); Security measures—in nuclear power plants
- Moridi, 3939
- Prue, 2148
- Tabuns, 3530
- Walker, 2148
- Bruce A nuclear station refurbishment
- Tabuns, 1110
- Chalk River nuclear laboratories
- Yakabuski, 1704
- Darlington nuclear station
- Eastern Power
- Singh, 1585
- environmental assessment process
- Pickering nuclear station
- O'Toole, 2943
- refurbishment
- Mantha, 3014
- Nurse practitioners
- Nurses. see also Mental health care—nurses
- Nursing homes. see Long-term care—senior citizens
- Nutrition