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| Watershed name | Number of low-marsh units | Area of low marsh (ha) | Number of high-marsh units | Area of high marsh (ha) | Number of upstream wetlands | Area of upstream wetlands (ha) |
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| Beausoleil-Severn Islands | 303 | 484.7 | 492 | 254.2 | 3 | 7.5 |
| Beaverstone River | 44 | 139.6 | 103 | 116.7 | 50 | 247.4 |
| Bedford-Rous Islands | 14 | 5.6 | 15 | 2.4 | 0 | 0.0 |
| Coldwater River | 49 | 796.7 | 100 | 334.4 | 0 | 0.0 |
| Eastern Coast Islands | 629 | 631.5 | 1035 | 403.5 | 169 | 353.1 |
| French River* | 413 | 164.4 | 554 | 175.1 | 260 | 462.7 |
| Giants Tomb* | 0 | 0.0 | 0 | 0.0 | 0 | 0.0 |
| Giroux River | 66 | 77.4 | 92 | 97.9 | 70 | 121.2 |
| Great La Cloche Island | 14 | 25.5 | 16 | 2.9 | 106 | 365.8 |
| Henvey Inlet-Key River | 77 | 108.2 | 134 | 95.5 | 183 | 594.8 |
| Killarney | 194 | 314.0 | 239 | 174.3 | 162 | 430.1 |
| Killarney Islands | 280 | 143.4 | 224 | 56.5 | 20 | 33.8 |
| La Cloche | 25 | 63.2 | 34 | 25.0 | 23 | 44.2 |
| La Cloche Islands | 10 | 3.0 | 24 | 9.7 | 0 | 0.0 |
| MacGregor-Sampson Islands | 81 | 72.4 | 162 | 91.9 | 23 | 186.4 |
| Magnetawan-Naiscoot Rivers | 27 | 60.8 | 49 | 83.5 | 167 | 347.7 |
| Moon-Musquash Islands | 426 | 293.3 | 620 | 135.9 | 42 | 161.9 |
| Moon-Musquash Rivers | 271 | 420.6 | 487 | 268.1 | 159 | 1707.6 |
| Muskoka Lakes | 0 | 0.0 | 0 | 0.0 | 6 | 7.4 |
| Naiscoot Lake | 0 | 0.0 | 0 | 0.0 | 9 | 5.5 |
| North River | 6 | 0.9 | 25 | 96.4 | 0 | 0.0 |
| Outer French-Pickerel Islands* | 359 | 125.4 | 343 | 80.0 | 46 | 51.8 |
| Parry Island | 83 | 108.1 | 126 | 67.7 | 40 | 410.7 |
| Parry Sound | 64 | 104.9 | 70 | 97.6 | 114 | 275.8 |
| Philip Edward Island | 125 | 169.7 | 150 | 65.4 | 92 | 198.0 |
| Pickerel River | 235 | 132.7 | 257 | 80.7 | 170 | 180.4 |
| Pointe au Baril | 105 | 126.3 | 193 | 109.2 | 270 | 708.5 |
| Sandy Bay | 29 | 41.8 | 52 | 20.8 | 39 | 254.0 |
| Seguin River | 1 | 4.4 | 9 | 2.6 | 17 | 34.2 |
| Severn River | 131 | 447.3 | 249 | 223.4 | 43 | 303.0 |
| Shawanaga River | 39 | 60.5 | 57 | 29.3 | 109 | 271.1 |
| Shebeshekong River | 42 | 200.5 | 96 | 95.1 | 137 | 585.0 |
| Spider Lake | 78 | 75.7 | 162 | 45.1 | 40 | 177.1 |
| Still River | 7 | 0.8 | 2 | 0.3 | 5 | 37.1 |
| Strawberry-Heywood Islands | 1 | 0.1 | 1 | 0.0 | 10 | 72.7 |
| Sturgeon River | 6 | 100.6 | 13 | 34.6 | 0 | 0.0 |
| Whitefish River | 410 | 256.9 | 677 | 231.5 | 75 | 352.8 |
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