The list of ecoregions in Indiana are listings of terrestrial ecoregions (see also, ecosystem) in the United States' State of Indiana, as defined separately by the United States Environmental Protection Agency (USEPA), and the World Wildlife Fund.

USEPA The USEPA ecoregion classification system has four levels, but only Levels I, III, and IV are shown on this list. Level I divides North America into 15 broad ecoregions (or biomes). Indiana is within the Eastern Temperate Forest environment, Level I region. Level IV ecoregions (denoted by numbers and letters) are a further subdivision of Level III ecoregions (denoted by numbers alone).Plant Maps Interactive - Indiana Ecoregions (based on EPA data), retrieved 2013-04-07Ecoregions of Indiana and Ohio USEPA 54 Central Corn Belt Plains 54a - Illinois/Indiana Prairie 54b - Chicago Lake Plain 54c - Kankakee Marsh 54d - Sand Area 55 Eastern Corn Belt Plains 55a - The Clayey, High Lime Till Plains 55b - The Loamy, High Lime Till Plains 55d - The Pre-Wisconsinan Drift Plains 55f - The Whitewater Interlobate Area 56 Southern Michigan/Northern Indiana Drift Plains 56a - The Lake Country 56b - The Elkhart Till Plains 56c - The Middle Tippecanoe Plains 56d - The Michigan Lake Plain 57 Huron/Erie Lake Plains 57a - The Maumee Lake Plains 71 Interior Plateau 71a - The Crawford Uplands 71b - The Mitchell Plain 71c - The Norman Upland 71d - The Northern Bluegrass 72 Interior River Valleys and Hills 72a - Wabash-Ohio Bottomlands 72b - Glaciated Wabash Lowlands 72c - The Southern Wabash Lowlands

World Wildlife Fund Realm Biome Ecoregion State Location Nearctic Temperate broadleaf and mixed forests Central U.S. hardwood forests Southern Indiana Nearctic Temperate broadleaf and mixed forests Southern Great Lakes forests North, Central, and Eastern Indiana Nearctic Temperate grasslands, savannas, and shrublands Central forest-grasslands transition Western Indiana

References

See: Ricketts, Taylor H; Eric Dinerstein; David M. Olson; Colby J. Loucks; et al. (1999). Terrestrial Ecoregions of North America: a Conservation Assessment. Island Press; Washington, DC

See also Geography of Indiana Climate of Indiana List of ecoregions in the United States (EPA) List of ecoregions in the United States (WWF)