Long Lake (Ontario)
- Canada
- List of lakes in Ontario
- Long Lake (Albanel Township, Ontario)
- Long Lake (Athelstane Lake)
- Long Lake (Bala, Ontario)
- Long Lake (Bracebridge, Ontario)
- Long Lake (Bruyere Township, Ontario)
- Long Lake (Calvin, Ontario)
- Long Lake (Capreol, Ontario)
- Long Lake (Cardwell Township, Ontario)
- Long Lake (Central Frontenac, Ontario)
- Long Lake (Central Manitoulin, Ontario)
- Long Lake (Common Township, Ontario)
- Long Lake (Douro-Dummer, Ontario)
- Long Lake (Dysart et al, Ontario)
- Long Lake (East Ferris, Ontario)
- Long Lake (East Mills Township, Ontario)
- Long Lake (Ermatinger Township, Ontario)
- Long Lake (Foley Township, Ontario)
- Long Lake (Fontaine Township, Ontario)
- Long Lake (Greater Madawaska, Ontario)
- Long Lake (Hastings County)
- Long Lake (Havelock-Belmont-Methuen, Ontario)
- Long Lake (Highlands East, Ontario)
- Long Lake (Humphrey Township, Ontario)
- Long Lake (Huron Shores, Ontario)
- Long Lake (Joly, Ontario)
- Long Lake (Kamungish River)
- Long Lake (Kashabowie, Ontario)
- Long Lake (Kawartha Lakes)
- Long Lake (Kearney, Nipissing District, Ontario)
- Long Lake (Kearney, Parry Sound District, Ontario)
- Long Lake (Kelly Township, Ontario)
- Long Lake (Laberge Township, Ontario)
- Long Lake (Lanark County)
- Long Lake (Laurentian Valley, Ontario)
- Long Lake (Lebel Township, Ontario)
- Long Lake (Leeds and Grenville United Counties, Ontario)
- Long Lake (Lorrain Township, Ontario)
- Long Lake (Machin, Ontario)
- Long Lake (Milner Township, Ontario)
- Long Lake (Nipissing, Ontario)
- Long Lake (North Kawartha, Ontario)
- Long Lake (North Shore, Ontario)
- Long Lake (Northeastern Manitoulin and the Islands, Ontario)
- Long Lake (Pelican Township, Ontario)
- Long Lake (Potter Township, Ontario)
- Long Lake (Rainy River District, Ontario)
- Long Lake (Redvers Township, Ontario)
- Long Lake (Rolph Township, Ontario)
- Long Lake (Sables-Spanish Rivers, Ontario)
- Long Lake (Saganagons Lake)
- Long Lake (Sampson Township, Ontario)
- Long Lake (Sharpe Township, Ontario)
- Long Lake (Shuniah, Ontario)
- Long Lake (Simcoe County)
- Long Lake (South Frontenac, Ontario)
- Long Lake (Sudbury, Ontario)
- Long Lake (Terrace Bay, Ontario)
- Long Lake (The Archipelago, Ontario)
- Long Lake (Thunder Bay District)
- Long Lake (Timmins)
- Long Lake (Turner Township, Ontario)
- Long Lake (Varley Township, Ontario)
- Long Lake (Wabigoon River)
- Long Lake (Wilson Township, Ontario)
- Long Lake (Wood Township, Ontario)
- Long Lake (Wylie Township, Ontario)
- Ontario
