List of protected areas of Ohio

National Park Service, Department of the Interior

Cuyahoga Valley National Park

Hopewell Culture National Historical Park

U.S. Forest Service, Department of Agriculture

Wayne National Forest

U.S. Fish and Wildlife Service, Department of the Interior

Ottawa National Wildlife Refuge Complex

Cedar Point National Wildlife Refuge

Ottawa National Wildlife Refuge

West Sister Island National Wildlife Refuge

Army Corps of Engineers, Department of Defense

Belleville Locks and Dam

Caesar Creek Dam (at Caesar Creek State Park)

Tom Jenkins Dam (at Burr Oak State Park)

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State Memorials

Adena State Memorial

Buckeye Furnace State Memorial

Campbell Mound State Memorial

Flint Ridge State Memorial

Friends Meeting House State Memorial

Fort Ancient State Memorial, Warren County

Fort Hill State Memorial

Glendower State Memorial, Warren County

Leo Petroglyph State Memorial

Miamisburg Mound State Memorial, Montgomery County

Serpent Mound State Memorial

Tarleton Cross Mound State Memorial

State Forests

Blue Rock State Forest - 4,572 acres (19 km²)

Brush Creek State Forest - ca. 12,000 acres (49 km²)

Dean State Forest - 2,745 acres (10 km²)

Fernwood State Forest - 2,107 acres (9 km²)

Gifford State Forest - 320 acres (1.3 km²); Athens County

Harrison State Forest - 1,345 acres (5 km²)

Hocking State Forest - 9,374 acres (38 km²)

Maumee State Forest - 3,068 acres (12 km²)

Mohican-Memorial State Forest - 4,192 acres (17 km²); Ashland County

Perry State Forest - 4,567 acres (18 km²); Perry County

Pike State Forest - 11,621 acres (47 km²)

Richland Furnace State Forest - 2,343 acres (9 km²)

Scioto Trail State Forest - 9,371 acres (38 km²)

Shade River State Forest - 2,601 acres (11 km²); Meigs County

Shawnee State Forest - 59,603 acres (241 km²); Scioto and Adams Counties

Sunfish Creek State Forest - 637 acres (2.6 km²)

Tar Hollow State Forest - 16,126 acres (65 km²)

Vinton Furnace State Experimental Forest - 15,849 acres

Waterloo State Forest (administered by Zaleski State Forest); Athens County

Yellow Creek State Forest - 756 acres (3.1 km²)

Zaleski State Forest - 26,313 acres (107 km²); Athens and Vinton Counties

State Wildlife Management Areas

Fox Lake Wildlife Management Area (Athens County)

Highlandtown Wildlife Area (Columbiana County, Washington Township)

Milan State Wildlife Area

Sunday Creek Wildlife Management Area (Athens County)

Tiffin River Wildlife Area (Fulton County)

Trimble Wildlife Management Area (Athens County)

Turkey Ridge Wildlife Area (Vinton County)

Waterloo Wildlife Research Station (Athens County)

Wolf Creek Wildlife Management Area (Morgan County)

State Nature Preserves

Acadia Cliffs State Nature Preserve

Adams Lake Prairie State Nature Preserve

Audubon Islands State Nature Preserve

Aurora Sanctuary State Nature Preserve

Baker Woods State Nature Preserve

Bigelow Cemetery Prairie State Nature Preserve

Blackhand Gorge State Nature Preserve

Boord State Nature Preserve

Brown's Lake Bog State Nature Preserve

Burton Wetlands State Nature Preserve

Caesar Creek Gorge State Nature Preserve

Carmean Woods State Nature Preserve

Cedar Bog State Nature Preserve

Chaparral Prairie State Nature Preserve

Clear Creek State Nature Preserve

Clear Fork Gorge State Nature Preserve

Clifton Gorge State Nature Preserve

Collier State Nature Preserve

Compass Plant Prairie State Nature Preserve

Conkle's Hollow State Nature Preserve

Conneaut Swamp State Nature Preserve

Cranberry Bog State Nature Preserve

Crooked Run State Nature Preserve

Culberson Woods State Nature Preserve

Davey Woods State Nature Preserve

Davis Memorial State Nature Preserve

Drew Woods State Nature Preserve

Dupont Marsh State Nature Preserve

Eagle Creek State Nature Preserve

Erie Sand Barrens State Nature Preserve

Fowler Woods State Nature Preserve

Gahanna Woods State Nature Preserve

Goll Woods State Nature Preserve

Goode Prairie State Nature Preserve

Greenville Falls State Nature Preserve

Gross Woods State Nature Preserve

Hach-Otis State Nature Preserve

Halls Creek Woods State Nature Preserve

Headlands Dunes State Nature Preserve

Herrick Fen State Nature Preserve

Hueston Woods State Nature Preserve

Hutchins (Highbanks) State Nature Preserve

Irwin Prairie State Nature Preserve

Jackson Bog State Nature Preserve

Johnson Ridge State Nature Preserve

Johnson Woods State Nature Preserve

Kendrick Woods State Nature Preserve

Kent (Cooperrider) Bog State Nature Preserve

Kessler Swamp State Nature Preserve

Kiser Lake Wetlands State Nature Preserve

Kitty Todd State Nature Preserve

Knox Woods State Nature Preserve

Kyle Woods State Nature Preserve

Lake Katharine State Nature Preserve

Lakeside Daisy State Nature Preserve

Lawrence Woods State Nature Preserve

Lou Campbell State Nature Preserve

Marie J. Desonier State Nature Preserve

Marsh Wetlands State Nature Preserve

Mentor Marsh State Nature Preserve

Milford Center Prairie State Nature Preserve

Morris Woods State Nature Preserve

North Pond State Nature Preserve

North Shore Alvar State Nature Preserve

Novak State Nature Preserve

Old Woman Creek State Nature Preserve

Olsen (Augusta-Anne) State Nature Preserve

Pickerington Ponds State Nature Preserve

Portage Lakes Wetland State Nature Preserve

Riddle State Nature Preserve

Rockbridge State Nature Preserve

Sears Woods State Nature Preserve

Seymour Woods State Nature Preserve

Shallenberger State Nature Preserve

Sharon Woods Gorge State Nature Preserve

Sheepskin Hollow State Nature Preserve

Sheldon Marsh State Nature Preserve

Shoemaker State Nature Preserve

Siegenthaler-Kaestner Esker State Nature Preserve

Smith Cemetery Prairie State Nature Preserve

Springville Marsh State Nature Preserve

Stage's Pond State Nature Preserve

Stratford Woods State Nature Preserve

Swamp Cottonwood State Nature Preserve

Thomas (Sharon Woods) State Nature Preserve

Tinker's Creek State Nature Preserve

Triangle Lake Bog State Nature Preserve

Tucker (Blacklick) State Nature Preserve

Tummonds State Nature Preserve

Wahkeena State Nature Preserve

Whipple State Nature Preserve

Zimmerman Prairie State Nature Preserve

Metroparks

A number of regional park districts have been organized in Ohio:

Cleveland Metroparks [1]

Columbus and Franklin County Metropolitan Park District [2]

Erie MetroParks [3]

Five Rivers Metroparks (Dayton) [4]

Geauga County Park District [5]

Johnny Appleseed Metropolitan Park District [6]

Lake Metroparks [7]

Lorain County Metro Parks [8]

Metro Parks, Serving Summit County [9]

Metroparks of Butler County [10]

Metroparks of the Toledo Area [11]

Mill Creek MetroParks [12]

Great Parks of Hamilton County

Other significant local areas

Arc of Appalachia

Athens Conservancy preserves, in Athens County, Ohio

Crane Hollow Nature Preserve, Hocking County, Ohio

Highlands Sanctuary, centered in Highland County, Ohio

Moonville Rail-Trail, a rail-trail in Athens and Vinton Counties

Strouds Ridge Preserve, City of Athens, Ohio

Trimble Community Forest in Athens County, Ohio

The Wilds (Muskingum County, Ohio)