Protected areas of Indiana include national forest lands, Army Corps of Engineers areas, state parks, state forests, state nature preserves, state wildlife management areas, and other areas.

Federal lands

National Park Service, Department of the Interior

• George Rogers Clark National Historical Park
• Indiana Dunes National Park
• Lewis and Clark National Historic Trail
  • Falls of the Ohio State Park
• Lincoln Boyhood National Memorial

U.S. Forest Service, Department of Agriculture

• Hoosier National Forest

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

• Big Oaks National Wildlife Refuge
• Muscatatuck National Wildlife Refuge
• Patoka River National Wildlife Refuge

Army Corps of Engineers, Department of Defense

• Brookville Lake Dam
• Cagles Mill Lake
• Cannelton Locks and Dam
• Cecil M Harden Lake Project (at Ferndale, Indiana)
• Falls of the Ohio National Wildlife Conservation Area
• J. Edward Roush Lake
• John T. Myers Locks and Dam
• Mississinewa Lake Dam
• Lake Monroe (Indiana)
• Newburgh Lock and Dam
• Salamonie Lake Dam

State lands

State parks

Indiana has 24 state parks maintained and operated by Indiana Department of Natural Resources (IDNR). In addition, a separate state agency operates White River State Park in Indianapolis.

State memorials

• Angel Mounds
• Corydon Historic District
• Culbertson Mansion State Historic Site
• Gene Stratton-Porter Cabin
• New Harmony Historic District
• Lanier Mansion
• Levi Coffin House
• Limberlost State Historic Site
• T. C. Steele State Historic Site
• Vincennes State Historic Site
• Whitewater Canal State Historic Site

State forests

• Clark State Forest - 25,288.8 acres (19 km²)
• Deam Lake State Recreation Area
• Ferdinand State Forest - 7,789.9 acres (10 km²)
• Frances Slocum State Forest
• Greene–Sullivan State Forest – 9,048.8 acres (1.3 km²); Athens County
• Harrison–Crawford State Forest – 24,322.7 acres (5 km²)
• Jackson–Washington State Forest - 18,416.2 acres (38 km²)
• Martin State Forest - 7,863.6 acres (12 km²)
• Morgan–Monroe State Forest - 25,789.7 acres (17 km²); Ashland County
• Mountain Tea State Forest - 1,153 acres (18 km²); Perry County
• Owen–Putnam State Forest - 6,589 acres (47 km²)
• Pike State Forest - 4,031.5 acres (9 km²)
• Ravinia State Forest - 1,500 acres (38 km²)
• Salamonie State Forest – 955.8 acres (11 km²); Meigs County
• Selmier State Forest – 350.4 acres (241 km²); Scioto and Adams Counties
• Starve Hollow Recreation Area - 278 acres (2.6 km²)
• Yellowwood State Forest - 25,084.4 acres (65 km²)

State fish wildlife areas

• Atterbury Fish and Wildlife Area
• Blue Grass Fish and Wildlife Area
• Chinook Fish and Wildlife Area
• Crosley Fish and Wildlife Area
• Deer Creek Fish and Wildlife Area
• Fairbanks Landing Fish and Wildlife Area
• Glendale Fish and Wildlife Area
• Goose Pond Fish and Wildlife Area
• Hillenbrand Fish and Wildlife Area
• Hovey Lake Fish and Wildlife Area
• Jasper-Pulaski Fish and Wildlife Area
• J.E. Roush Lake Fish and Wildlife Area
• Kankakee Fish and Wildlife Area
• Kingsbury Fish and Wildlife Area
• LaSalle Fish and Wildlife Area
• Pigeon River Fish and Wildlife Area
• Splinter Ridge Fish and Wildlife Area
• Sugar Ridge Fish and Wildlife Area
• Tri-County Fish and Wildlife Area
• Wabashiki Fish and Wildlife Area
• Wilbur Wright Fish and Wildlife Area
• Willow Slough Fish and Wildlife Area
• Winamac Fish and Wildlife Area