Huckleberry Swamp Huckleberry Swamp Columbiana 1204 Hanoverton
Watercress Marsh Watercress Marsh Columbiana 1184 Hanoverton
Bear Swamp (historical) Bear Swamp (historical) Union 1099 Peoria
Bear Swamp (historical) Bear Swamp (historical) Stark 1040 Alliance
Potato Creek Swamp (historical) Potato Creek Swamp (historical) Wyandot 853 Wharton
Beaver Pond Beaver Pond Trumbull 899 Southington
Long Swamp Long Swamp Trumbull 925 Champion
Mantua Swamp Mantua Swamp Portage 1125 Mantua
Bloomfield Swamp Bloomfield Swamp Trumbull 889 Bristolville
Beaver Swamp (historical) Beaver Swamp (historical) Putnam 745 Hamler
Cedar Swamp Cedar Swamp Champaign 968 Urbana West
North Pond North Pond Erie 571 Kelleys Island
Hog Creek Marsh (historical) Hog Creek Marsh (historical) Hardin 935 Dunkirk
Killbuck Swamp Killbuck Swamp Wayne 837 Holmesville
Tamarack Swamp (historical) Tamarack Swamp (historical) Wayne 991 Doylestown
Cranberry Marsh Cranberry Marsh Licking 886 Thornville
Copley Swamp (historical) Copley Swamp (historical) Summit 965 Akron West
Mentor Marsh Mentor Marsh Lake 584 Mentor
Crane Swamp Crane Swamp Union 994 Milford Center
Perkins Swamp (historical) Perkins Swamp (historical) Summit 974 Akron West
Pine Swamp (historical) Pine Swamp (historical) Summit 994 Hudson
Harrisville Swamp (historical) Harrisville Swamp (historical) Medina 902 Lodi
Blue Hole (historical) Blue Hole (historical) Coshocton 768 Fresno
Hog Creek Marsh (historical) Hog Creek Marsh (historical) Allen Unknown
Cranberry Marsh (historical) Cranberry Marsh (historical) Crawford Unknown
Poudunk Swamp (historical) Poudunk Swamp (historical) Cuyahoga Unknown
South Pond South Pond Erie Unknown
Cranberry Marsh (historical) Cranberry Marsh (historical) Hancock Unknown
Bear Swamp (historical) Bear Swamp (historical) Huron Unknown
Canterbury Swamp (historical) Canterbury Swamp (historical) Huron Unknown
Cattaraugus Swamp (historical) Cattaraugus Swamp (historical) Huron Unknown
Cranberry Swamp (historical) Cranberry Swamp (historical) Huron Unknown
Grape Swamp (historical) Grape Swamp (historical) Huron Unknown
Great Bear Swamp (historical) Great Bear Swamp (historical) Lorain Unknown
Bloody Run Swamp (historical) Bloody Run Swamp (historical) Licking 889 Millersport
Big Belly Swamp (historical) Big Belly Swamp (historical) Morrow Unknown
Feather Bed Swamp (historical) Feather Bed Swamp (historical) Morrow Unknown
Long Swamp (historical) Long Swamp (historical) Morrow Unknown
Prairie Swamp (historical) Prairie Swamp (historical) Morrow Unknown
Rose Swamp (historical) Rose Swamp (historical) Morrow Unknown
Wildcat Swamp (historical) Wildcat Swamp (historical) Morrow Unknown
Newmans Creek Swamp (historical) Newmans Creek Swamp (historical) Wayne Unknown
Black Swamp (historical) Black Swamp (historical) Richland Unknown
Cranberry Swamp (historical) Cranberry Swamp (historical) Wyandot Unknown
Cranbery Marsh (historical) Cranbery Marsh (historical) Wyandot Unknown
Brushs Swamp (historical) Brushs Swamp (historical) Seneca Unknown
Coes Swamp (historical) Coes Swamp (historical) Seneca Unknown
New Haven Marshes (historical) New Haven Marshes (historical) Seneca Unknown
Tamarack Swamp Tamarack Swamp Summit Unknown
Nelson Swamp (historical) Nelson Swamp (historical) Trumbull Unknown
Bear Swamp (historical) Bear Swamp (historical) Van Wert Unknown
Baker Swamp Baker Swamp Jackson 709 Oak Hill
Cackley Swamp Cackley Swamp Jackson 669 Oak Hill
Wood Duck Marsh Wood Duck Marsh Trumbull 902 Bristolville
Guilford Bog Guilford Bog Columbiana 1115 Lisbon
Garfield Bog Garfield Bog Mahoning 1109 Damascus
New Albany Marsh New Albany Marsh Mahoning 1037 Salem
Snyder Bog Snyder Bog Mahoning 1093 Columbiana
Jackson Bog Jackson Bog Stark 1004 Massillon
Buckeye Swamp Buckeye Swamp Franklin 722 Northwest Columbus
Mosquito Lake Bog (historical) Mosquito Lake Bog (historical) Champaign 1063 Saint Paris
Scioto Marsh (historical) Scioto Marsh (historical) Hardin 965 Alger
Willow Point Marsh Willow Point Marsh Erie 568 Vickery
Winous Point Marsh Winous Point Marsh Ottawa 571 Vickery
Lost Fen Lost Fen Geauga 1073 Chesterland