ECOREGION: Bluegrass
Bartholomew, Clark, Dearborn, Decatur, Fayette, Floyd, Franklin, Jackson, Jefferson, Jennings, Ohio, Ripley, Scott, Switzerland, Union

ECOREGION: Bluffton Till Plain
Adams, Allen, Blackford, DeKalb, Delaware, Grant, Huntington, Jay, Miami, Wabash, Wells

ECOREGION: Entrenched Valley
Fountain, Montgomery, Parke, Putnam, Tippecanoe, Vermillion

ECOREGION: Grand Prairie
Benton, Jasper, Newton, Pulaski, Starke, Warren, White

ECOREGION: Highland Rim and Shawnee Hills
Brown, Crawford, Dubois, Greene, Harrison, Lawrence, Martin, Monroe, Morgan, Orange, Owen, Perry, Washington

ECOREGION: Northern Lakes
Elkhart, Fulton, Kosciusko, LaGrange, Marshall, Noble, St. Joseph, Steuben, Whitley

ECOREGION: NW Morainal
La Porte, Lake, Porter

ECOREGION: Southern Bottomlands & Southwestern Lowlands
Clay, Daviess, Gibson, Knox, Pike, Posey, Spencer, Sullivan, Vanderburgh, Vigo, Warrick

ECOREGION: Tipton Till Plain
Boone, Carroll, Cass, Clinton, Hamilton, Hancock, Hendricks, Henry, Howard, Johnson, Madison, Marion, Randolph, Rush, Shelby, Tipton, Wayne