Indiana - Significance region: Local
| Griffith E.J. and E. Interlocking Tower |
| Griffith Grand Trunk Depot |
| Griffith State Bank |
| Grose, Gen. William, House |
| Grouping of Religious Buildings at Trinity |
| Grover |
| Gruenewald House |
| Gump House |
| Guthrie, William B. & Laura, House |
| Guyer Opera House |
| Haag, J.H., House |
| Hack and Simon Office Building |
| Hagemann, Frederick and Augusta, Farm |
| Hager House |
| Hagerman, William C. and Clara, House |
| Hagerstown I.O.O.F. Hall |
| Haines, James, Farm |
| Halderman-Van Buskirk Farmstead |
| Halleck, Charles, Student Center |
| Hall Farm |
| Hall School |
| Halsted, Melvin A., House |
| Hamilton, John, House |
| Hamilton Township Schoolhouse No. 4 |
| Hamline Chapel, United Methodist Church |
| Hammond Block (Budnick's Trading Mart) |
| Hanna-Ochler-Elder House |
| Hanover College Historic District |
| Hansen Branch-Hammond Public Library |
| Happy Hollow Heights Historic District |
| Harcourt, James F., House |
| Harding and Miller Music Company |
| Hardy-Baumgaertner House |
| Harrell, Dr. Samuel, House |
| Harriett |
| Harris, Bright B., House |
| Harrison Hill Historic District |
| Hartford City Courthouse Square Historic District |
| Hartman, Louis and Anna K. Kunz, House |
| Haskell and Barker Historic District |
| Haste-Crumpacker House |
| Hathaway-Parker House |
| Haubstadt State Bank |
| Haughville Historic District |
| Haven Hubbard Home |
| Haverstick, Hiram A., Farmstead |
| Haw Creek Leather Company |
| Hawley Heights Historic District |
| Hawthorne Branch Library No. 2 |
| Hazelett, Richard M., House |
| HCS Motor Car Company |
| Heagy, D.W., Farm |
| Heath, David S., House |
| Hebron Meadows Historic District |
| Heck-Hasler House |
| Hedden's Grove Historic District |
| Hedrick, John W., House |
| Heier's Hotel |
| Helton-Mayo Farm |
| Heminger Travel Lodge |
| Hendricks County Bridge Number 316 |
| Hendricks County Jail and Sheriff's Residence |
| Hendricks County Poor Asylum |
| Hendricks, Thomas A., House and Stone Head Road Marker |
| Hendricks, Thomas A., Library |
| Henley, Henry, Public Library |
| Henry County Courthouse |
| Henry County Memorial Park |
| Herriott House |
| Herron-Morton Place Historic District |
| Hershey House |
| Hesler, Clinton F., Farm |
| Highland Golf and Country Club |
| Highland Lawn Cemetery |
| Highland Park Neighborhood Historic District |
| Hill Crest Community Center |
| Hillcrest Country Club |
| Hill, John Fitch, House |
| Hills and Dales Historic District |
| Hinkle-Garton Farmstead |
| Hinkle, W. R., and Co. |
| Hinshaw, Elias, House |
| Hippodrome Theatre |
| Hirt, Alfred, House |
| Hoban, Martin, House |
| Hobart Carnegie Library |
| Hobart Commercial District |
| Hobart First Methodist Episcopal Church |
| Hoffman Hotel |
| Hofherr, Martin, Farm |
| Hoham-Klinghammer-Weckerle House and Brewery Site |
| Hohman Avenue Commercial Historic District |
| Holliday Hydroelectric Powerhouse and Dam |
| Holy Rosary-Danish Church Historic District |
| Homecroft Historic District |
| Home Laundry Company |
| Homestead Hotel |
| Hominy Ridge Shelter House |
| Honey Creek School |
| Honeywell Memorial Community Center |
Data from United States Park Service and Wikidata
