| ID | Historical Marker | County |
|---|
| 01.1977.1 | The Wayne Trace | Adams |
| 02.1992.2 | Wabash and Erie Canal Groundbreaking | Allen |
| 02.2000.1 | Fort Miamis | Allen |
| 02.2003.1 | Gronauer Lock No. 2 | Allen |
| 03.1999.1 | Madison and Indianapolis Railroad | Bartholomew |
| 06.1966.2 | Michigan Road | Boone |
| 06.2021.1 | Henry C. Ulen, 1871-1963 | Boone |
| 08.1963.1 | Sycamore Row | Carroll |
| 08.1992.1 | Wabash and Erie Canal | Carroll |
| 09.1966.1 | Wabash & Erie Canal | Cass |
| 11.1999.1 | Crosscut Canal Eel River Feeder Dam | Clay |
| 11.1999.2 | Crosscut Canal | Clay |
| 13.1992.1 | Leavenworth | Crawford |
| 14.1992.1 | Baltimore & Ohio Southwestern Railroad Depot | Daviess |
| 14.1997.1 | Indiana's Early Bird Pilot | Daviess |
| 14.2007.1 | Wabash and Erie Canal | Daviess |
| 15.1966.1 | Kibbey's Road | Dearborn |
| 15.1999.1 | Canal Junction | Dearborn |
| 16.2014.1 | Carl Fisher | Decatur |
| 17.1992.1 | Auburn Automobile Company | DeKalb |
| 17.1996.1 | Spencerville Covered Bridge | DeKalb |
| 17.2023.1 | Spencerville Covered Bridge | DeKalb |
| 19.1949.1 | Buffalo Trace Vincennes to Clarksville | Dubois |
| 21.1966.1 | The Whitewater Canal | Fayette |
| 22.1999.1 | Buffalo Trace Route | Floyd |
| 22.2007.2 | New Albany and Salem Railroad (The Monon) | Floyd |
| 23.1997.1 | Attica & Covington Canal Skirmish | Fountain |
| 23.2023.1 | 1846 Canal Skirmish | Fountain |
| 24.19??.? | Whitewater Canal | Franklin |
| 24.1965.1 | Whetzel Trace (1818-1823) | Franklin |
| 24.2005.1 | Snow Hill Covered Bridge | Franklin |
| 25.1949.1 | Michigan Road | Fulton |
| 27.1992.1 | Former Narrow Gauge Railroad / Railroad Construction | Grant |
| 28.1998.1 | Richland-Plummer Creek Covered Bridge | Greene |
| 29.1994.1 | The Central Canal | Hamilton |
| 29.2005.1 | Conner Street Historic District | Hamilton |
| 29.2005.2 | Conner Street Historic District | Hamilton |
| 29.2007.1 | Potter's Covered Bridge | Hamilton |
| 33.1949.1 | National Road | Henry |
| 33.1966.1 | Birthplace of Wilbur Wright | Henry |
| 34.1966.1 | Haynes' Horseless Carriage | Howard |
| 35.1972.1 | Forks of Wabash | Huntington |
| 35.1973.1 | Canal Landing on Washington Street / Jefferson Park Mall | Huntington |
| 35.1979.3 | Huntington's Buildings Over the River / Huntington's Ford and First Bridge | Huntington |
| 35.1997.1 | Wabash & Erie Canal Lock 4 | Huntington |
| 39.1996.1 | Madison Hill Incline and Cut | Jefferson |
| 40.1997.2 | Kellar Grist Mill | Jennings |
| 43.1995.1 | Lawrence D. Bell | Kosciusko |
| 43.1999.1 | Chinworth Bridge | Kosciusko |
| 43.2007.1 | Chinworth Bridge | Kosciusko |
| 45.1966.1 | Great Sauk (Sac) Trail (east-west through this point) | Lake |
| 45.1996.1 | The Lincoln Highway / The "Ideal Section" | Lake |
| 45.1996.2 | The Lincoln Highway / The "Ideal Section" | Lake |
| 45.2022.1 | Hagenbeck-Wallace Circus / 1918 Circus Train Wreck | Lake |
| 46.1995.1 | Chicago-New York Electric Air Line Railroad | LaPorte |
| 47.1967.1 | Astronaut Virgil I. Grissom April 3, 1926 - January 27, 1967 | Lawrence |
| 48.1967.1 | Indiana's First Interurban | Madison |
| 49.1961.3 | Toll House - Michigan Road | Marion |
| 49.1966.2 | The Central Canal | Marion |
| 49.1979.2 | Ben Davis Railroad Station | Marion |
| 49.1992.5 | Site of the Central Canal | Marion |
| 49.1995.2 | Joseph W. Summers Memorial Bridge | Marion |
| 49.1995.3 | Joseph W. Summers Memorial Bridge | Marion |
| 49.2004.1 | Brookville Road | Marion |
| 49.2015.1 | Allison Machine Shop | Marion |
| 49.2018.2 | WWI Aviation Repair Depot | Marion |
| 53.2000.1 | Ferry Bridge | Monroe |
| 54.1993.1 | Darlington Covered Bridge | Montgomery |
| 55.1957.1 | Whetzel Trace | Morgan |
| 57.1992.1 | Sylvan Lake | Noble |
| 60.2008.1 | Cataract Falls Covered Bridge | Owen |
| 61.1966.1 | Wabash & Erie Canal | Parke |
| 61.1998.1 | Portland Mills Covered Bridge | Parke |
| 62.1961.1 | Abraham S. Fulton | Perry |
| 62.1965.1 | Civil War Memorial Grave 1865 | Perry |
| 63.1966.1 | The Buffalo Trace | Pike |
| 63.1976.1 | Wabash and Erie Canal Completed 1853 | Pike |
| 63.1992.1 | Wabash and Erie Canal | Pike |
| 64.1995.2 | Willow Creek Confrontation | Porter |
| 68.2005.1 | Farmland Downtown Historic District | Randolph |
| 69.1949.1 | Michigan Road | Ripley |
| 69.1966.1 | Kibbey's Road* | Ripley |
| 69.1972.1 | Berry's Trace | Ripley |
| 69.2006.1 | Ohio and Mississippi Railroad | Ripley |
| 71.1968.2 | First Bridge | St. Joseph |
| 71.2010.1 | Lincoln & Dixie Highways | St. Joseph |
| 72.2002.4 | Scottsburg Depot | Scott |
| 72.2002.6 | Lake Iola Interurban Site | Scott |
| 72.2002.8 | Marshfield Train Robbery | Scott |
| 72.2002.9 | Town of Austin | Scott |
| 73.1951.1 | Jacob Whetzel Trace | Shelby |
| 73.1966.2 | Indiana's First Railroad | Shelby |
| 73.2011.1 | Whetzel Trace | Shelby |
| 79.1953.1 | Tecumseh Trail | Tippecanoe |
| 79.1973.1 | The Wabash River | Tippecanoe |
| 79.1998.1 | Centennial Historic District | Tippecanoe |
| 82.1947.1 | Wabash and Erie Canal | Vanderburgh |
| 83.1995.1 | Newport Covered Bridge | Vermillion |
| 83.1995.2 | Eugene Covered Bridge | Vermillion |
| 83.1997.1 | The Hillsdale Steps | Vermillion |
| 84.1947.3 | Terre Haute [Transportation Center] | Vigo |
| 84.1988.1 | Crossroads of America | Vigo |
| 84.1998.1 | Crossroads of America | Vigo |
| 85.1992.1 | Paradise Spring Treaty Ground | Wabash |
| 89.1992.2 | Cambridge City | Wayne |
| 90.2019.1 | Kingsland Interurban Wreck | Wells |
| 91.1982.1 | Monon, Indiana | White |
