- Mackenzie Mts, Macmillan Pass area, km 480 Canol Rd.1
- Mackenzie River Delta, Campbell Lake Creek.1
- Mackenzie River Delta, north of airport.1
- Mackenzie River, Yellowknife Higway. Mile 46.6 S.1
- Madawaska2
- Madeline Lake, hills to south. Rt. 4; 15.5 mi. e. of Yellowknife1
- Madeline Lake; Rt. 4 15.5 mi. e of Yellowknife1
- Magdalen Islands, Grindstone, Grindstone Island.1
- Magdalen Islands, Ile du Havre Aubert, l'Anse-a-la-Cabane at end of Chemin du Moulin.1
- Magdalen Islands, Les Sillons, West side of Hwy 199, South of Pont du Detroit.1
- Magpie River, Michipicoten. Vicinity of Michipicoten Harbour.1
- Mahon Lake.1
- Maidstone Tp, lots 18 & 19, Conc VII, woodlot south of Hwy 401.1
- Mainland opposite Moss Island on Nipigon Straits, 33 km SE of Red Rock.1
- Malahide Township, Catfish Creek, 4.8 km SE of Sparta.3
- Malden Township, Holiday beach provincial park, Lake Erie, 8 miles southeast of Amherstburg.1
- Malhide Township, Conc IV, close to the Yarmouth Township line, 4 km east of Sparta, north of road, at east branch of Catfish Creek.1
- Mandaumin Woods, Sarnia.1
- Manicouagan4
- Manitoba64