| ID | Historical Marker | County |
|---|
| 02.1948.1 | Site of Fort Miamis | Allen |
| 02.2000.1 | Fort Miamis | Allen |
| 04.1966.1 | New Purchase Boundary (Treaty of St. Mary's) | Benton |
| 05.1989.1 | Godfroy Reserve | Blackford |
| 06.1961.1 | Indian Cemetery Eel River Tribe of Miamis | Boone |
| 06.1962.1 | Patrick H. Sullivan 1794-1879 | Boone |
| 06.1966.1 | Gergraphical Center of Indiana | Boone |
| 06.2019.1 | Sugar Creek Community | Boone |
| 08.1966.1 | New Purchase Boundary (Treaty of St. Mary's) | Carroll |
| 09.1947.1 | Battle of Olde Towne | Cass |
| 10.194?.1 | Clarksville | Clark |
| 10.1991.1 | Lewis & Clark Expedition 1803-1806 | Clark |
| 14.1966.1 | Vincennes Donation Lands | Daviess |
| 14.1999.1 | Fort Flora | Daviess |
| 19.1949.1 | Buffalo Trace Vincennes to Clarksville | Dubois |
| 19.1966.1 | Buckingham's Base Line | Dubois |
| 19.2018.1 | Buckingham's Base Line | Dubois |
| 20.1966.1 | Indiana Territory Line | Elkhart |
| 22.1991.1 | New Albany | Floyd |
| 22.1992.2 | New Albany | Floyd |
| 22.1992.3 | Clark's Grant | Floyd |
| 24.1965.1 | Whetzel Trace (1818-1823) | Franklin |
| 24.1992.1 | Brookville Historic District | Franklin |
| 24.1995.1 | Old Franklin United Brethren Church | Franklin |
| 24.1995.3 | Intersection of Treaty Lines | Franklin |
| 27.1966.1 | New Purchase Boundary (Treaty of St. Mary's) | Grant |
| 27.2020.1 | Weaver Settlement | Grant |
| 29.2016.1 | Roberts Settlement | Hamilton |
| 31.1966.1 | Last Home of Squire Boone | Harrison |
| 31.1966.3 | Mt. Solomon Lutheran Church | Harrison |
| 31.1966.5 | Harrison County | Harrison |
| 31.1966.6 | Pfrimmer’s Chapel Evangelical United Brethren Church | Harrison |
| 31.2004.1 | John Shields Lewis and Clark Expedition Member | Harrison |
| 33.1949.1 | National Road | Henry |
| 35.2005.1 | Kiilhsoohkwa (Kilsoquah) | Huntington |
| 36.1951.1 | Fort Vallonia | Jackson |
| 36.1966.1 | Indian Treaty Corner | Jackson |
| 36.1966.2 | In Memory of Col. John Ketcham 1782-1865 / Time Capsule | Jackson |
| 37.1966.1 | La Salle Expedition | Jasper |
| 40.1966.1 | Grouseland Treaty Line (August 21, 1805) | Jennings |
| 40.2003.1 | Vernon Historic District | Jennings |
| 42.1966.2 | Fort Knox, First Site | Knox |
| 42.1995.1 | Old French House | Knox |
| 42.2006.1 | William Henry Harrison & Lewis & Clark Expedition | Knox |
| 42.2011.1 | Tecumseh and Harrison | Knox |
| 43.1962.1 | Papakeechie's Reserve | Kosciusko |
| 43.1962.2 | Indian Hill | Kosciusko |
| 46.1999.1 | Indiana Territory Boundary Line | LaPorte |
| 49.1960.1 | Anthony Wayne 1745-1796 | Marion |
| 49.1975.1 | Mary Bryan, Pioneer Woman | Marion |
| 50.1966.1 | Second Principal Meridian | Marshall |
| 50.2011.1 | Benack's Village | Marshall |
| 51.1966.1 | Site of Hindostan (.6 mile south) | Martin |
| 54.1981.1 | Chief Cornstalk's Village | Montgomery |
| 54.2002.1 | William Bratton Lewis and Clark Expedition Member | Montgomery |
| 55.1957.1 | Whetzel Trace | Mogan |
| 56.1966.1 | State Line Survey | Newton |
| 58.1961.1 | Lochry's Defeat | Ohio |
| 59.1961.1 | Pivot Point | Orange |
| 59.1966.1 | Freeman's Corner (250 feet east) | Orange |
| 59.2004.1 | Orleans Congress Square | Orange |
| 61.1966.2 | Armiesburg | Parke |
| 61.1966.3 | Roseville | Parke |
| 61.1968.1 | 10 O'Clock Line | Parke |
| 61.1968.2 | 10 O'Clock Line | Parke |
| 61.1968.4 | Turkey Run | Parke |
| 67.1966.1 | 10 O'Clock Treaty Line | Putnam |
| 68.2010.1 | Randolph County Quakers | Randolph |
| 69.1972.1 | Berry's Trace | Ripley |
| 71.19??.? | La Salle's Camp | St. Joseph |
| 71.1966.1 | Indiana Territorial Line (east-west boundary at this point) | St. Joseph |
| 72.2001.2 | John Kimberlin Farm | Scott |
| 72.2002.5 | Northern Boundary of Clark's Grant | Scott |
| 72.2004.1 | Pigeon Roost | Scott |
| 73.1952.1 | Jacob Whetzel Trace | Shelby |
| 73.1959.1 | De Witt Pioneer Home | Shelby |
| 73.2011.1 | Whetzel Trace | Shelby |
| 74.1992.1 | James Gentry, Sr. | Spencer |
| 74.1995.1 | David Turnham (1803-1884) | Spencer |
| 75.2000.1 | La Salle in Indiana | Starke |
| 76.2000.1 | Indiana's Northern Boundary Line | Steuben |
| 79.1973.1 | The Wabash River | Tippecanoe |
| 79.1998.2 | Fort Ouiatenon | Tippecanoe |
| 80.1966.1 | New Purchase Boundary (Treaty of St. Mary's) | Tipton |
| 82.2018.1 | Glenn A. Black (1900-1964) | Vanderburgh |
| 84.1950.1 | Entering Indiana The Hoosier State | Vigo |
| 84.2004.1 | Wea Tribe at Terre Haute | Vigo |
| 87.1966.1 | Angel Mounds | Warrick |
| 88.1981.1 | Brock Cemetery | Washington |
| 92.1959.1 | Wm. Wells 1770-1812 | Whitley |
| 92.1966.2 | Site of Little Turtle's Miami Village | Whitley |
