| Name | Class | Area | Est'd |
|---|
| Aaron [1] | Recreation | 117 ha (290 acres) | 1958 |
| Abitibi-de-Troyes [2] | Waterway | 4,340 ha (10,700 acres) | 1985 |
| Adam Creek [3] | Nature Reserve | 50 ha (120 acres) | 1985 |
| Agassiz Peatlands [4] | Nature Reserve | 5,415 ha (13,380 acres) | 1985 |
| Albany River [5] | Waterway | 95,100 ha (235,000 acres) | 1989 |
| Albert Lake Mesa [6] | Nature Reserve | 130 ha (320 acres) | 1985 |
| Alexander Lake Forest [7] | Natural Environment | 1,934 ha (4,780 acres) | 2003 |
| Alexander Stewart [8] | Nature Reserve | 30 ha (74 acres) | 2003 |
| Algoma Headwaters [9] | Natural Environment | 42,745 ha (105,630 acres) | 2003 |
| Algonquin [10] | Natural Environment | 772,300 ha (1,908,000 acres) | 1893 |
| Amable du Fond River [11] | Waterway | 731 ha (1,810 acres) | 2003 |
| Arrow Lake [12] | Recreation | 386 ha (950 acres) | 1957 |
| Arrowhead [13] | Natural Environment | 1,237 ha (3,060 acres) | 1971 |
| Arrowhead Peninsula [14] | Nature Reserve | 815 ha (2,010 acres) | 1985 |
| Aubinadong River [15] | Waterway | 2,722 ha (6,730 acres) | 2002 |
| Aubinadong–Nushatogaini Rivers [9] | Waterway | 4,928 ha (12,180 acres) | 2003 |
| Aubrey Falls [16] | Natural Environment | 4,860 ha (12,000 acres) | 1985 |
| Awenda [17] | Natural Environment | 2,915 ha (7,200 acres) | 1975 |
| Balsam Lake [18] | Recreation | 449 ha (1,110 acres) | 1968 |
| Barron River [19] | Waterway | 539 ha (1,330 acres) | 2006 |
| Bass Lake [20] | Recreation | 65 ha (160 acres) | 1957 |
| Batchawana Bay [21] | Recreation | 169 ha (420 acres) | 1973 |
| Batchawana River [22] | Waterway | 2,684 ha (6,630 acres) | 2004 |
| Bayview Escarpment [23] | Nature Reserve | 439 ha (1,080 acres) | 1985 |
| Beattie Pinery [24] | Nature Reserve | 68 ha (170 acres) | 1997 |
| Bell Bay [25] | Natural Environment | 558 ha (1,380 acres) | 1989 |
| Big East River [26] | Waterway | 1,050 ha (2,600 acres) | 2000 |
| Bigwind Lake [27] | Natural Environment | 1,967 ha (4,860 acres) | 1985 |
| Biscotasi Lake [28] | Natural Environment | 12,283 ha (30,350 acres) | 2001 |
| Bissett Creek [29] | Waterway | 1,676 ha (4,140 acres) | 2006 |
| Black Creek [30] | Natural Environment | 335 ha (830 acres) | 1989 |
| Black Sturgeon River [31] | Waterway | 23,531 ha (58,150 acres) | 2002 |
| Blind River [32] | Waterway | 5,402 ha (13,350 acres) | 2002 |
| Blue Jay Creek [33] | Natural Environment | 246 ha (610 acres) | 1997 |
| Blue Lake [34] | Recreation | 2,314 ha (5,720 acres) | 1960 |
| Bon Echo [35] | Natural Environment | 8,294 ha (20,490 acres) | 1965 |
| Bonheur River Kame [36] | Nature Reserve | 800 ha (2,000 acres) | 1985 |
| Bonnechere [37] | Recreation | 162 ha (400 acres) | 1967 |
| Bonnechere River [38] | Waterway | 1,217 ha (3,010 acres) | 1989 |
| Boyne Valley [39] | Natural Environment | 431 ha (1,070 acres) | 1985 |
| Brightsand River [40] | Waterway | 41,250 ha (101,900 acres) | 1989 |
| Bronte Creek [41] | Recreation | 682 ha (1,690 acres) | 1975 |
| Burnt Lands [42] | Nature Reserve | 516 ha (1,280 acres) | 2003 |
| Butler Lake [43] | Nature Reserve | 3,400 ha (8,400 acres) | 1985 |
| Cabot Head [44] | Nature Reserve | 4,514 ha (11,150 acres) | 1985 |
| Caliper Lake [45] | Recreation | 147 ha (360 acres) | 1960 |
| Carson Lake [46] | Recreation | 12 ha (30 acres) | 1971 |
| Castle Creek [47] | Nature Reserve | 1,075 ha (2,660 acres) | 1985 |
| Cavern Lake [48] | Nature Reserve | 189 ha (470 acres) | 1975 |
| Centennial Lake [49] | Nature Reserve | 530 ha (1,300 acres) | 1989 |
| Chapleau-Nemegosenda River [50] | Waterway | 17,732 ha (43,820 acres) | 1973 |
| Charleston Lake [51] | Natural Environment | 2,596 ha (6,410 acres) | 1976 |
| Chiniguchi Waterway [52] | Waterway | 9,368 ha (23,150 acres) | 2006 |
| Chutes [53] | Recreation | 108 ha (270 acres) | 1970 |
| Clear Creek Forest [54] | Nature Reserve | 402 ha (990 acres) | 2014 |
| Coral Rapids [55] | Nature Reserve | 12 ha (30 acres) | 1985 |
| Craigleith [56] | Recreation | 66 ha (160 acres) | 1967 |
| Craig's Pit [57] | Nature Reserve | 530 ha (1,300 acres) | 1985 |
| Cranberry Lake [58] | Nature Reserve | 2,800 ha (6,900 acres) | 1985 |
| Daisy Lake Uplands [59] | Nature Reserve | 600 ha (1,500 acres) | 2006 |
| Dana-Jowsey Lakes [60] | Recreation | 2,538 ha (6,270 acres) | 1989 |
| Darlington [61] | Recreation | 209 ha (520 acres) | 1957 |
| Devil's Glen [62] | Recreation | 60 ha (150 acres) | 1965 |
| Devon Road Mesa [63] | Nature Reserve | 60 ha (150 acres) | 1985 |
| Divide Ridge [64] | Nature Reserve | 542 ha (1,340 acres) | 1985 |
| Dividing Lake [65] | Nature Reserve | 469 ha (1,160 acres) | 1985 |
| Driftwood [66] | Recreation | 422 ha (1,040 acres) | 1963 |
| Duclos Point [67] | Nature Reserve | 111 ha (270 acres) | 1985 |
| Duncan Escarpment [68] | Nature Reserve | 161 ha (400 acres) | 1985 |
| Dupont [69] | Nature Reserve | 614 ha (1,520 acres) | 2011 |
| Eagle-Dogtooth [70] | Waterway | 41,128 ha (101,630 acres) | 2003 |
| Earl Rowe [71] | Recreation | 312 ha (770 acres) | 1964 |
| East English River [72] | Waterway | 17,513 ha (43,280 acres) | 2003 |
| East Sister Island [73] | Nature Reserve | 53 ha (130 acres) | 1976 |
| Edward Island [74] | Nature Reserve | 600 ha (1,500 acres) | 1985 |
| Egan Chutes [75] | Nature Reserve | 1,106 ha (2,730 acres) | 1989 |
| Emily [76] | Recreation | 83 ha (210 acres) | 1957 |
| Englehart River Fine Sand Plain and Waterway [77] | Waterway | 4,041 ha (9,990 acres) | 2002 |
| Esker Lakes [78] | Natural Environment | 6,516 ha (16,100 acres) | 1957 |
| Fairbank [79] | Recreation | 105 ha (260 acres) | 1957 |
| Fawn River [80] | Waterway | 12,134 ha (29,980 acres) | 1989 |
| Ferris [81] | Recreation | 198 ha (490 acres) | 1962 |
| Finlayson Point [82] | Recreation | 47 ha (120 acres) | 1963 |
| Fish Point [83] | Nature Reserve | 110 ha (270 acres) | 1985 |
| Fitzroy [84] | Recreation | 198 ha (490 acres) | 1963 |
| Five Mile Lake [85] | Recreation | 457 ha (1,130 acres) | 1958 |
| Forks of the Credit [86] | Natural Environment | 282 ha (700 acres) | 1985 |
| Foy [87] | Recreation | 147 ha (360 acres) | 1985 |
| Fraleigh Lake [88] | Nature Reserve | 825 ha (2,040 acres) | 1985 |
| Frederick House Lake [89] | Nature Reserve | 13 ha (32 acres) | 1985 |
| French River [90] | Waterway | 73,530 ha (181,700 acres) | 1989 |
| Frontenac [91] | Natural Environment | 5,214 ha (12,880 acres) | 1974 |
| Fushimi Lake [92] | Recreation | 5,294 ha (13,080 acres) | 1979 |
| Gem Lake Maple Bedrock [93] | Nature Reserve | 90 ha (220 acres) | 2002 |
| Gibson River [94] | Nature Reserve | 333 ha (820 acres) | 1968 |
| Goose Island [95] | Nature Reserve | 72 ha (180 acres) | 2008 |
| Goulais River [9] | Waterway | 5,084 ha (12,560 acres) | 2003 |
| Grant’s Creek [96] | Waterway | 1,444 ha (3,570 acres) | 2006 |
| Grassy River-Mond Lake Lowlands and Ferris Lake Uplands [97] | Nature Reserve | 2,602 ha (6,430 acres) | 2005 |
| Gravel River [98] | Nature Reserve | 763 ha (1,890 acres) | 1985 |
| Greenwater [99] | Natural Environment | 8,504 ha (21,010 acres) | 1957 |
| Groundhog River Waterway [100] | Waterway | 11,036 ha (27,270 acres) | 2006 |
| Grundy Lake [101] | Natural Environment | 3,614 ha (8,930 acres) | 1959 |
| Gull River [102] | Waterway | 7,194 ha (17,780 acres) | 2003 |
| Halfway Lake [103] | Natural Environment | 5,412 ha (13,370 acres) | 1985 |
| Hardy Lake [104] | Natural Environment | 808 ha (2,000 acres) | 1985 |
| Hicks-Oke Bog [105] | Nature Reserve | 5,880 ha (14,500 acres) | 1994 |
| Hockley Valley [106] | Nature Reserve | 377 ha (930 acres) | 1989 |
| Holland Landing Prairie [107] | Nature Reserve | 34 ha (84 acres) | 1994 |
| Hope Bay Forest [108] | Nature Reserve | 353 ha (870 acres) | 1985 |
| Indian Point [109] | Natural Environment | 947 ha (2,340 acres) | 1989 |
| Inverhuron [110] | Cultural Heritage | 288 ha (710 acres) | 1967 |
| Ira Lake [111] | Nature Reserve | 30 ha (74 acres) | 1989 |
| Ivanhoe Lake [112] | Natural Environment | 7,705 ha (19,040 acres) | 1957 |
| J. Albert Bauer [113] | Natural Environment | 164 ha (410 acres) | 1985 |
| James N. Allan [114] | Recreation | 117 ha (290 acres) | 1989 |
| Jocko Rivers [115] | Waterway | 11,299 ha (27,920 acres) | 2003 |
| John E. Pearce [116] | Nature Reserve | 68 ha (170 acres) | 1957 |
| Johnston Harbour-Pine Tree Point [117] | Nature Reserve | 929 ha (2,300 acres) | 1989 |
| Kabitotikwia River [118] | Nature Reserve | 1,965 ha (4,860 acres) | 1985 |
| Kaiashk [119] | Nature Reserve | 780 ha (1,900 acres) | 1989 |
| Kakabeka Falls [120] | Natural Environment | 500 ha (1,200 acres) | 1967 |
| Kama Hills [121] | Nature Reserve | 1 ha (2.5 acres) | 1985 |
| Kap-Kig-Iwan [122] | Natural Environment | 461 ha (1,140 acres) | 1957 |
| Kashabowie [123] | Natural Environment | 2,055 ha (5,080 acres) | 1985 |
| Kawartha Highlands [124] | Natural Environment | 37,587 ha (92,880 acres) | 1989 |
| Kenny Forest [125] | Natural Environment | 2,200 ha (5,400 acres) | 1994 |
| Kesagami [126] | Wilderness | 55,977 ha (138,320 acres) | 1983 |
| Kettle Lakes [127] | Recreation | 1,261 ha (3,120 acres) | 1957 |
| Killarney [128] | Wilderness | 49,325 ha (121,880 acres) | 1964 |
| Killarney Lakelands and Headwaters [129] | Natural Environment | 15,346 ha (37,920 acres) | 2006 |
| Killbear [130] | Natural Environment | 1,760 ha (4,300 acres) | 1960 |
| Komoka [131] | Recreation | 198 ha (490 acres) | 1989 |
| Kopka River [132] | Waterway | 31,205 ha (77,110 acres) | 1989 |
| La Cloche [133] | Natural Environment | 7,448 ha (18,400 acres) | 1985 |
| La Motte Lake [134] | Recreation | 575 ha (1,420 acres) | 1989 |
| La Verendrye [135] | Waterway | 18,280 ha (45,200 acres) | 1989 |
| Lady Evelyn-Smoothwater [136] | Wilderness | 72,400 ha (179,000 acres) | 1973 |
| Lake Abitibi Islands [137] | Nature Reserve | 2,721 ha (6,720 acres) | 2005 |
| Lake Nipigon [138] | Natural Environment | 918 ha (2,270 acres) | 1960 |
| Lake of the Woods [139] | Natural Environment | 20,675 ha (51,090 acres) | 1967 |
| Lake on the Mountain [140] | Recreation | 104 ha (260 acres) | 1957 |
| Lake St. Peter [141] | Recreation | 478 ha (1,180 acres) | 1971 |
| Lake Superior [142] | Natural Environment | 160,810 ha (397,400 acres) | 1944 |
| Larder River Waterway [143] | Waterway | 4,044 ha (9,990 acres) | 1985 |
| Lighthouse Point [144] | Nature Reserve | 96 ha (240 acres) | 1985 |
| Limestone Islands [145] | Nature Reserve | 450 ha (1,100 acres) | 1980 |
| Lion's Head [146] | Nature Reserve | 526 ha (1,300 acres) | 1985 |
| Little Abitibi [147] | Natural Environment | 20,733 ha (51,230 acres) | 1985 |
| Little Cove [148] | Nature Reserve | 16 ha (40 acres) | 1985 |
| Little Current River [149] | Waterway | 9,930 ha (24,500 acres) | 1989 |
| Little Greenwater Lake [150] | Nature Reserve | 244 ha (600 acres) | 1985 |
| Little White River [151] | Waterway | 12,782 ha (31,590 acres) | 2002 |
| Livingstone Point [152] | Nature Reserve | 1,800 ha (4,400 acres) | 1985 |
| Lola Lake [153] | Nature Reserve | 6,572 ha (16,240 acres) | 1985 |
| Long Point [154] | Recreation | 150 ha (370 acres) | 1921 |
| Lower Madawaska River [155] | Waterway | 1,200 ha (3,000 acres) | 1989 |
| MacGregor Point [156] | Natural Environment | 1,204 ha (2,980 acres) | 1975 |
| MacLeod [157] | Recreation | 74 ha (180 acres) | 1963 |
| MacMurchy Township End Moraine [158] | Nature Reserve | 239 ha (590 acres) | 2002 |
| Magnetawan River [159] | Waterway | 3,424 ha (8,460 acres) | 2003 |
| Makobe-Grays River [160] | Waterway | 1,427 ha (3,530 acres) | 1985 |
| Manitou Islands [161] | Nature Reserve | 1,926 ha (4,760 acres) | 1989 |
| Mara [162] | Recreation | 450 ha (1,100 acres) | 1970 |
| Mark S. Burnham [163] | Recreation | 39 ha (96 acres) | 1955 |
| Marten River [164] | Recreation | 400 ha (990 acres) | 1960 |
| Mashkinonje [165] | Natural Environment | 2,109 ha (5,210 acres) | 1963 |
| Matawatchan [166] | Nature Reserve | 65 ha (160 acres) | 1968 |
| Matawin River [167] | Nature Reserve | 2,615 ha (6,460 acres) | 1985 |
| Matinenda [168] | Natural Environment | 28,758 ha (71,060 acres) | 2003 |
| Mattagami River Beach & Aeolian Deposit [169] | Nature Reserve | 164 ha (410 acres) | 2003 |
| Mattawa River [170] | Waterway | 14,142 ha (34,950 acres) | 1970 |
| Maynard Lake [171] | Nature Reserve | 30 ha (74 acres) | 1997 |
| McRae Point [172] | Recreation | 138 ha (340 acres) | 1971 |
| Menzel Centennial [173] | Nature Reserve | 914 ha (2,260 acres) | 1997 |
| Michipicoten [174] | Cultural Heritage | 289 ha (710 acres) | 1982 |
| Michipicoten Island [175] | Natural Environment | 36,740 ha (90,800 acres) | 1985 |
| Mikisew [176] | Recreation | 131 ha (320 acres) | 1964 |
| Minnitaki Kames [177] | Nature Reserve | 4,422 ha (10,930 acres) | 1989 |
| Misery Bay [178] | Nature Reserve | 1,076 ha (2,660 acres) | 1989 |
| Missinaibi [179] | Waterway | 116,110 ha (286,900 acres) | 1970 |
| Mississagi [180] | Natural Environment | 8,328 ha (20,580 acres) | 1973 |
| Mississagi Delta [181] | Nature Reserve | 2,395 ha (5,920 acres) | 1985 |
| Mississagi River [182] | Waterway | 91,247 ha (225,480 acres) | 1974 |
| Mono Cliffs [183] | Natural Environment | 732 ha (1,810 acres) | 1985 |
| Montreal River [184] | Nature Reserve | 44 ha (110 acres) | 1968 |
| Morris Tract [185] | Nature Reserve | 59 ha (150 acres) | 1997 |
| Murphys Point [186] | Natural Environment | 1,239 ha (3,060 acres) | 1967 |
| Nagagami Lake [187] | Nature Reserve | 1,650 ha (4,100 acres) | 1985 |
| Nagagamisis [188] | Natural Environment | 40,683 ha (100,530 acres) | 1957 |
| Nakina Moraine [189] | Natural Environment | 5,319 ha (13,140 acres) | 1994 |
| Neys [190] | Natural Environment | 5,475 ha (13,530 acres) | 1965 |
| Nimoosh [191] | Waterway | 3,550 ha (8,800 acres) | 2002 |
| Noganosh Lake [192] | Waterway | 3,082 ha (7,620 acres) | 2003 |
| Noisy River [193] | Nature Reserve | 378 ha (930 acres) | 1989 |
| North Beach [194] | Recreation | 94 ha (230 acres) | 1970 |
| North Channel Inshore [195] | Waterway | 3,762 ha (9,300 acres) | 2002 |
| North Driftwood River [196] | Nature Reserve | 3 ha (7.4 acres) | 1985 |
| Nottawasaga Lookout [197] | Nature Reserve | 130 ha (320 acres) | 1994 |
| O'Donnell Point [198] | Nature Reserve | 875 ha (2,160 acres) | 1985 |
| Oastler Lake [199] | Recreation | 32 ha (79 acres) | 1967 |
| Obabika River [200] | Waterway | 20,520 ha (50,700 acres) | 1989 |
| Obatanga [201] | Natural Environment | 9,409 ha (23,250 acres) | 1967 |
| Obonga-Ottertooth [202] | Waterway | 21,157 ha (52,280 acres) | 2003 |
| Ogoki River [203] | Waterway | 23,250 ha (57,500 acres) | 2004 |
| Ojibway [204] | Natural Environment | 2,631 ha (6,500 acres) | 1963 |
| Ojibway Prairie [205] | Nature Reserve | 64 ha (160 acres) | 1977 |
| Opasquia [206] | Wilderness | 473,000 ha (1,170,000 acres) | 1983 |
| Opeongo River [207] | Waterway | 955 ha (2,360 acres) | 1985 |
| Otoskwin-Attawapiskat River [208] | Waterway | 82,529 ha (203,930 acres) | 1989 |
| Ottawa River [209] | Waterway | 125 ha (310 acres) | 1989 |
| Ouimet Canyon [210] | Nature Reserve | 777 ha (1,920 acres) | 1972 |
| Oxtongue River-Ragged Falls [211] | Waterway | 507 ha (1,250 acres) | 1985 |
| Pakwash [212] | Natural Environment | 3,993 ha (9,870 acres) | 1967 |
| Pan Lake Fen [213] | Nature Reserve | 496 ha (1,230 acres) | 2000 |
| Pancake Bay [214] | Recreation | 1,659 ha (4,100 acres) | 1968 |
| Pantagruel Creek [215] | Nature Reserve | 2,685 ha (6,630 acres) | 1989 |
| Petawawa Terrace [216] | Nature Reserve | 200 ha (490 acres) | 2006 |
| Peter's Woods [217] | Nature Reserve | 349 ha (860 acres) | 1976 |
| Petroglyphs [218] | Cultural Heritage | 1,643 ha (4,060 acres) | 1976 |
| Pichogen River Mixed Forest [219] | Nature Reserve | 3,043 ha (7,520 acres) | 2003 |
| Pigeon River [220] | Natural Environment | 949 ha (2,350 acres) | 1960 |
| Pipestone River [221] | Waterway | 97,375 ha (240,620 acres) | 1989 |
| Point Farms [222] | Recreation | 308 ha (760 acres) | 1970 |
| Pokei Lake-White River Wetlands [223] | Nature Reserve | 1,768 ha (4,370 acres) | 2000 |
| Polar Bear [224] | Wilderness | 2,355,200 ha (5,820,000 acres) | 1970 |
| Porphyry Island [225] | Nature Reserve | 107 ha (260 acres) | 1968 |
| Port Bruce [226] | Recreation | 7 ha (17 acres) | 1974 |
| Port Burwell [227] | Recreation | 231 ha (570 acres) | 1971 |
| Potholes [228] | Nature Reserve | 247 ha (610 acres) | 1985 |
| Prairie River Mouth [229] | Nature Reserve | 380 ha (940 acres) | 1985 |
| Presqu'ile [230] | Natural Environment | 982 ha (2,430 acres) | 1922 |
| Pretty River Valley [231] | Natural Environment | 808 ha (2,000 acres) | 1985 |
| Puff Island [232] | Nature Reserve | 9 ha (22 acres) | 1985 |
| Pukaskwa River [233] | Waterway | 1,465 ha (3,620 acres) | 2002 |
| Pushkin Hills [234] | Nature Reserve | 5 ha (12 acres) | 1985 |
| Puzzle Lake [235] | Natural Environment | 3,724 ha (9,200 acres) | 2001 |
| Quackenbush [236] | Cultural Heritage | 40 ha (99 acres) | 1985 |
| Queen Elizabeth II Wildlands [237] | Natural Environment | 35,505 ha (87,730 acres) | 2002 |
| Quetico [238] | Wilderness | 471,942 ha (1,166,190 acres) | 1913 |
| Rainbow Falls [239] | Recreation | 576 ha (1,420 acres) | 1963 |
| Red Sucker Point [240] | Nature Reserve | 360 ha (890 acres) | 1985 |
| René Brunelle [241] | Recreation | 3,015 ha (7,450 acres) | 1957 |
| Restoule [242] | Natural Environment | 2,619 ha (6,470 acres) | 1963 |
| Rideau River [243] | Recreation | 98 ha (240 acres) | 1963 |
| River Aux Sables [244] | Waterway | 3,423 ha (8,460 acres) | 2006 |
| Rock Point [245] | Recreation | 187 ha (460 acres) | 1957 |
| Rondeau [246] | Natural Environment | 3,254 ha (8,040 acres) | 1894 |
| Round Lake [247] | Nature Reserve | 2,585 ha (6,390 acres) | 1989 |
| Ruby Lake [248] | Natural Environment | 2,734 ha (6,760 acres) | 2002 |
| Rushbrook [249] | Natural Environment | 2,159 ha (5,340 acres) | 2006 |
| Rushing River [250] | Recreation | 340 ha (840 acres) | 1958 |
| Sable Islands [251] | Nature Reserve | 2,641 ha (6,530 acres) | 1985 |
| Samuel de Champlain [252] | Natural Environment | 2,550 ha (6,300 acres) | 1967 |
| Sandbanks [253] | Natural Environment | 1,551 ha (3,830 acres) | 1970 |
| Sandbar Lake [254] | Natural Environment | 8,053 ha (19,900 acres) | 1970 |
| Sandpoint Island [255] | Natural Environment | 914 ha (2,260 acres) | 1985 |
| Sandy Islands [256] | Nature Reserve | 2,553 ha (6,310 acres) | 2001 |
| Sauble Falls [257] | Recreation | 20 ha (49 acres) | 1971 |
| Schreiber Channel [258] | Nature Reserve | 13 ha (32 acres) | 1979 |
| Sedgman Lake [259] | Nature Reserve | 5,710 ha (14,100 acres) | 1985 |
| Selkirk [260] | Recreation | 73 ha (180 acres) | 1967 |
| Serpent Mounds [261] | Natural Environment | 108 ha (270 acres) | 1957 |
| Severn River [262] | Waterway | 82,960 ha (205,000 acres) | 1989 |
| Sextant Rapids [263] | Nature Reserve | 4 ha (9.9 acres) | 1985 |
| Shallow River [264] | Nature Reserve | 2 ha (4.9 acres) | 1985 |
| Sharbot Lake [265] | Recreation | 80 ha (200 acres) | 1958 |
| Shesheeb Bay [266] | Nature Reserve | 275 ha (680 acres) | 1985 |
| Short Hills [267] | Natural Environment | 661 ha (1,630 acres) | 1985 |
| Sibbald Point [268] | Recreation | 225 ha (560 acres) | 1957 |
| Silent Lake [269] | Natural Environment | 1,610 ha (4,000 acres) | 1977 |
| Silver Falls [270] | Natural Environment | 3,260 ha (8,100 acres) | 1985 |
| Silver Lake [271] | Recreation | 43 ha (110 acres) | 1958 |
| Sioux Narrows [272] | Recreation | 135 ha (330 acres) | 1957 |
| Six Mile Lake [273] | Recreation | 212 ha (520 acres) | 1958 |
| Slate Islands [274] | Natural Environment | 6,570 ha (16,200 acres) | 1985 |
| Sleeping Giant [275] | Natural Environment | 24,400 ha (60,000 acres) | 1944 |
| Smokey Head-White Bluff [276] | Nature Reserve | 347 ha (860 acres) | 1985 |
| Solace [277] | Waterway | 5,943 ha (14,690 acres) | 1989 |
| South Bay [278] | Recreation | 1,525 ha (3,770 acres) | 1985 |
| Spanish River [28] | Waterway | 35,386 ha (87,440 acres) | 2001 |
| Springwater [279] | Recreation | 193 ha (480 acres) | 1958 |
| Spruce Islands [280] | Nature Reserve | 1,497 ha (3,700 acres) | 1985 |
| St. Raphael [281] | Waterway | 90,521 ha (223,680 acres) | 2003 |
| Steel River [282] | Waterway | 11,240 ha (27,800 acres) | 1989 |
| Stoco Fen [283] | Nature Reserve | 203 ha (500 acres) | 1985 |
| Sturgeon Bay [284] | Recreation | 14 ha (35 acres) | 1960 |
| Sturgeon River [285] | Waterway | 7,985 ha (19,730 acres) | 1989 |
| Temagami River [286] | Waterway | 3,394 ha (8,390 acres) | 2000 |
| Thackeray [287] | Nature Reserve | 116 ha (290 acres) | 1985 |
| The Massasauga [288] | Natural Environment | 13,105 ha (32,380 acres) | 1989 |
| The Pinery [289] | Natural Environment | 2,532 ha (6,260 acres) | 1957 |
| The Shoals [290] | Natural Environment | 10,644 ha (26,300 acres) | 1970 |
| Thompson Island [291] | Nature Reserve | 145 ha (360 acres) | 1985 |
| Tide Lake [292] | Nature Reserve | 54 ha (130 acres) | 1997 |
| Tidewater [293] | Natural Environment | 980 ha (2,400 acres) | 1970 |
| Timber Island [294] | Nature Reserve | 44 ha (110 acres) | 1985 |
| Trillium Woods [295] | Nature Reserve | 10 ha (25 acres) | 1969 |
| Trout Lake [296] | Nature Reserve | 7,150 ha (17,700 acres) | 1989 |
| Turkey Point [297] | Recreation | 316 ha (780 acres) | 1959 |
| Turtle River-White Otter Lake [298] | Waterway | 49,294 ha (121,810 acres) | 1989 |
| Upper Madawaska River [299] | Waterway | 1,085 ha (2,680 acres) | 1989 |
| Uxbridge [300] | Recreation | 532 ha (1,310 acres) | 2024 |
| Voyageur [301] | Recreation | 1,465 ha (3,620 acres) | 1966 |
| Wabakimi [302] | Wilderness | 892,061 ha (2,204,330 acres) | 1983 |
| Wakami Lake [303] | Recreation | 12,316 ha (30,430 acres) | 1973 |
| Wanapitei [304] | Natural Environment | 3,413 ha (8,430 acres) | 1985 |
| Wasaga Beach [305] | Recreation | 1,844 ha (4,560 acres) | 1959 |
| Waubaushene Beaches [306] | Nature Reserve | 34 ha (84 acres) | 1969 |
| Wenebegon River [307] | Waterway | 16,383 ha (40,480 acres) | 2003 |
| West Bay [308] | Nature Reserve | 1,120 ha (2,800 acres) | 1985 |
| West English River [309] | Waterway | 22,922 ha (56,640 acres) | 2003 |
| West Montreal River [310] | Waterway | 7,259 ha (17,940 acres) | 2002 |
| West Sandy Island [311] | Nature Reserve | 266 ha (660 acres) | 1994 |
| Westmeath [312] | Natural Environment | 610 ha (1,500 acres) | 1985 |
| Wheatley [313] | Recreation | 241 ha (600 acres) | 1971 |
| White Lake [314] | Natural Environment | 4,048 ha (10,000 acres) | 1963 |
| White Lake Peatlands [315] | Nature Reserve | 992 ha (2,450 acres) | 1997 |
| Whitesand [316] | Waterway | 11,337 ha (28,010 acres) | 2003 |
| Widdifield Forest [317] | Natural Environment | 2,170 ha (5,400 acres) | 2002 |
| Wildgoose Outwash Deposit [318] | Nature Reserve | 1,198 ha (2,960 acres) | 2005 |
| Williams Island [319] | Nature Reserve | 8 ha (20 acres) | 1985 |
| Windigo Bay [320] | Nature Reserve | 8,378 ha (20,700 acres) | 1989 |
| Windigo Point [321] | Nature Reserve | 513 ha (1,270 acres) | 1989 |
| Windy Lake [322] | Recreation | 118 ha (290 acres) | 1959 |
| Winisk River [323] | Waterway | 141,100 ha (349,000 acres) | 1969 |
| Winnange Lake [324] | Natural Environment | 4,745 ha (11,730 acres) | 1985 |
| W.J.B. Greenwood [325] | Recreation | 465 ha (1,150 acres) | 1985 |
| Wolf Island [326] | Natural Environment | 222 ha (550 acres) | 1985 |
| Woman River Forest Deposit [327] | Natural Environment | 6,305 ha (15,580 acres) | 2003 |
| Woodland Caribou [328] | Wilderness | 470,620 ha (1,162,900 acres) | 1983 |