Cuyahoga Valley National Park • Dayton Aviation Heritage National Historical Park • Hopewell Culture National Historical Park • First Ladies National Historic Site • James A. Garfield National Historic Site • William Howard Taft National Historic Site • David Berger National Memorial • Perry's Victory and International Peace Memorial

Adams Lake • Alum Creek • A.W. Marion • Barkcamp • Beaver Creek • Blue Rock • Buck Creek • Buckeye Lake • Burr Oak • Caesar Creek • Catawba Island • Cleveland Lakefront • Cowan Lake • Crane Creek • Deer Creek • Delaware • Dillon • East Fork • East Harbor • Findley • Forked Run • Fox Island • Geneva • Grand Lake St. Marys • Great Seal • Guilford Lake • Harrison Lake • Headlands Beach • Hocking Hills • Hueston Woods • Independence Dam • Indian Lake • Jackson Lake • Jefferson Lake • John Bryan • Kelleys Island • Kiser Lake • Lake Alma • Lake Hope • Lake Logan • Lake Loramie • Lake Milton • Lake White • Little Miami • Madison Lake • Malabar Farm • Marblehead Lighthouse • Mary Jane Thurston • Middle Bass Island • Maumee Bay • Mohican • Mosquito Lake • Mt. Gilead • Muskingum River • Nelson Kennedy Ledges • Paint Creek • Pike Lake • Portage Lakes • Punderson • Pymatuning • Quail Hollow • Rocky Fork • Salt Fork • Scioto Trail • Shawnee • South Bass Island • Stonelick • Strouds Run • Sycamore • Tar Hollow • Tinker's Creek • Van Buren • West Branch • Wolf Run

Beaver Creek • Blue Rock • Brush Creek • Dean • Fernwood • Gifford • Harrison • Hocking • Maumee • Mohican-Memorial • Perry • Pike • Richland Furnace • Scioto Trail • Shade River • Shawnee • Sunfish • Tar Hollow • Yellow Creek • Zaleski

Acadia Cliffs • Adams Lake Prairie • Audubon Islands • Augusta-Anne Olsen • Aurora Sanctuary • Baker Woods • Evans Beck Memorial • Betsch Fen • Bigelow Cemetery • Blackhand Gorge • Bonnet Pond • Boord • Brown's Lake Bog • Burton Wetlands • Caesar Creek Gorge • Lou Campbell • Carmean Woods • Cedar Bog • Chaparral Prairie • Christmas Rocks • Clear Creek • Clear Fork Gorge • Clifton Gorge • Howard Collier • Compass Plant Prairie • Conkle's Hollow • Copperrider-Kent Bog • Crabill Fen • Cranberry Bog • Crane Hollow • Crooked Run • Culberson Woods • Davey Woods • Davis Memorial • Marie J. Desonier • Drew Woods • Dupont Marsh • Eagle Creek • Emerald Hills • Erie Sand Barrens • Etawah Woods • Flatiron Lake Bog • Fowler Woods • Frame Lake Fen • Gahanna Woods • Gallagher/Springfield Fen • Goll Woods • Goode Prairie • Gott Fen • Greenbelt • Greenville Falls • Gross Memorial Woods • Hatch-Otis • Halls Creek • Headlands Dunes • Hueston Woods • Hutchins (Highland) • Irwin Prairie • Jackson Bog • Johnson Ridge • Johnson Woods • Karlo Fen • Kendrick Woods • Kessler Swamp • Kiser Lake Wetlands • Kitty Todd • Knox Woods • Kyle Woods • Ladd Natural Bridge • Lake Kathatine • Lakeside Daisy • Lawrence Woods • Little Rocky Hollow • Mantua Bog • Marsh Wetlands • McCracken Fen • Mentor Marsh • Milford Center Railroad Prairie • Miller • Morris Woods • Mud Lake Bog • Myersville • Newberry • North Pond • North Shore Alvar • Novak Sanctuary • Old Woman Creek • Owens/Liberty Fen • Pallister • Pickerington Ponds • Portage Lakes Wetland • Prairie Road Fen • William C. McCoy • Raven Rock • Rhododendeon Cove • Rockbridge • Rome • Rothenbuhler Woods • Saltpetre Cave • Sears Woods • Seymour Woods • Shallenberger • Sharon Woods Gorge • Sheepskin Hollow • Sheick Hollow • Sheldon Marsh • Siegenthaler-Kaestner Esker • Smith Cemetery • Spring Beauty Dell • Spring Brook Sanctuary • Springville Marsh • Stage's Pond • Strait Creek Prairie • Stratford Woods • Swamp Cottonwood • Edward Thomas • Tinker's Creek • Travertine Fen • Triangle Lake Bog • Trillium Trails • Walter Tucker • Tummonds • Warder-Perkins • Whipple • White Pine Bog Forest • Zimmermand Prairie

Big Darby Creek • Chagrin River • Conneaut Creek • Cuyahoga River • Grand River • Greenville Creek • Kokosing River • Little Beaver Creek • Little Darby Creek • Little Miami River • Maumee River • Mohican River • Olentangy River • Sandusky River • Stillwater Creek