Indiana - Area of significance: Architecture
| Hour Glass Cottage |
| House at 823 Ohio Street |
| Howard Home |
| Howard Masonic Temple |
| Howard Park Historic District |
| Howe, John Badlam, Mansion |
| Hoyt, Lyman and Asenath, House |
| Hubbard, Willard and Josephine, House |
| Huber Motor Sales Building |
| Huddleston House Tavern, The |
| Hulman Building [Morris Plan (Central Union Bank)] |
| Huntingburg Commercial Historic District |
| Huntingburg Town Hall and Fire Engine House |
| Hurlbert, Lewis, Sr., House |
| Hy-Red Gasoline Station |
| Ibach House |
| Iddings-Gilbert-Leader-Anderson Block |
| Igleheart, Edgar A., House |
| Illsley Place-West Rudisill Historic District |
| I & M Building |
| Immanuel Lutheran Church |
| Independence Historic District |
| Independent Turnverein |
| Indiana and Michigan Avenues Historic District |
| Indiana Avenue Historic District |
| Indiana Bell Building |
| Indiana Harbor Public Library |
| Indiana Limestone Company Building |
| Indiana Oxygen Company |
| Indianapolis Athletic Club |
| Indianapolis City Hall, Old |
| Indianapolis Fire Headquarters and Municipal Garage |
| Indianapolis Masonic Temple |
| Indianapolis News Building |
| Indianapolis Public Library Branch No. 1 |
| Indianapolis Public Library Branch No. 3 |
| Indianapolis Public Library Branch No. 6 |
| Indianapolis Union Railroad Station |
| Indianapolis Union Station-Wholesale District |
| Indianapolis Veterans Administration Hospital |
| Indianapolis White Castle Number 3 |
| Indiana School for the Deaf |
| Indiana Soldiers' and Sailors' Children's Home |
| Indiana State Capitol |
| Indiana State Library and Historical Building |
| Indiana State Prison South-Indiana Reformatory- Colgate-Palmolive Historic District |
| Indiana State Soldiers Home Historic District |
| Indiana Theatre |
| Indiana Theatre |
| Indiana War Memorial Historic District |
| Indian Village Historic District |
| Indi-Illi Park Historic District |
| Ingle Terrace |
| I.O.R.M. Hall, Tonkawa No. 326 |
| Irvington Historic District |
| Irvington Terrace Historic District |
| Irwin Union Bank and Trust, Eastbrook Plaza Branch |
| Jackson County Courthouse |
| Jackson, Lowell E. and Paula G., House |
| Jackson-Monroe Terraces Historic District |
| Jacoby Church and Cemetery |
| James E. Roberts School 97 |
| Jamieson-Bennett House |
| Jasper County Courthouse |
| Jasper Downtown Historic District |
| Jasper High School Gymnasium |
| Jaworowski, George and Adele, House |
| Jay, Abijah C., House |
| Jay County Courthouse |
| Jefferson County Jail |
| Jefferson Elementary School |
| Jefferson Historic District |
| Jefferson Street Historic District |
| Jefferson Union Church and Sweet Cemetery |
| Jenkins, Israel, House |
| Jenkins Place |
| Jerman School |
| Jerolaman-Long House |
| Jersey Park Farm |
| Jessup, Joel, Farm |
| J. M. S. Building |
| Johnson County Courthouse Square |
| Johnson-Denny House |
| Johnson's Creamery |
| Johnson's, Oliver, Woods Historic District |
| Jones, Col. William, House |
| Jones, Lewis, House |
| Jones, Margaret and George Riley, House |
| Jordan, Arthur, Memorial Hall |
| Josiah White’s Manual Labor Institute |
| Journal-Gazette Building |
| Judie, James A., House |
| Judson Building |
| Julian-Clark House |
| Jump, Dr. Samuel Vaughn, House |
| Junction Railroad Depot |
| Kahn Tailoring Company |
| Kamm and Schellinger Brewery |
| Keilman, Francis P. House |
| Keip, John, House |
Data from United States Park Service and Wikidata
