Indiana - Criteria: C (architecture/engineering)
| Garvin Park |
| Garwood, John and Cynthia, Farmstead |
| Gary Bathing Beach Aquatorium |
| Gary City Center Historic District |
| Gary Public Schools Memorial Auditorium |
| Gas City High School |
| Gaseteria, Inc. |
| Gaskill-Erwin Farm |
| Geiger, Fred, and Sons National Biscuit Company |
| Gemcraft-Wittmer Building |
| General German Protestant Orphans Home |
| Geneva Downtown Commercial Historic District |
| Gennett, Henry and Alice, House |
| George Rogers Clark National Historical Park |
| George Street Bridge |
| Georgetown Historic District |
| German Bank |
| German Reformed Church |
| Gibson Company Building |
| Gibson County Courthouse |
| Gilson, Clinton D., Barn |
| Glencoe |
| Glendale Park Historic District |
| Glossbrenner, Alfred M., Mansion |
| Golden Hill Historic District |
| Goodland-Grant Township Public Library |
| Goshen Carnegie Public Library |
| Goshen Historic Distriict |
| Gosport Historic District |
| Gowdy, John K., House |
| Graham, Robert C., House |
| Graham, William H. H., House |
| Gramelspacher-Gutzweiler House |
| Gramse, The |
| Grand Rapids and Indiana Railroad Depot |
| Grant County Jail and Sheriff's Residence |
| Grassyfork Fisheries Farm No. 1 |
| Green Block |
| Greenfield Courthouse Square Historic District |
| Greenfield Residential Historic District |
| Greenlawn Cemetery |
| Greensburg Carnegie Public Library |
| Greensburg Downtown Historic District |
| Greenwood Commercial Historic District |
| Greenwood Elementary School |
| Gregg Park |
| Greyhound Bus Terminal |
| Griffin, Cornish, Round Barn |
| Griffith E.J. and E. Interlocking Tower |
| Grisamore House |
| Grose, Gen. William, House |
| Grouping of Religious Buildings at Trinity |
| Grover |
| Gruenewald House |
| Gump 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 |
| Haimbaugh, John, Round Barn |
| Haines, James, Farm |
| Halderman-Van Buskirk Farmstead |
| Hall-Crull Octagonal House |
| Halleck, Charles, Student Center |
| Hall Farm |
| Hall School |
| Halsted, Melvin A., House |
| Hamilton County Courthouse Square |
| Hamilton, John, House |
| Hamilton Township Schoolhouse No. 4 |
| Hamline Chapel, United Methodist Church |
| Hammond Block (Budnick's Trading Mart) |
| Hanna-Ochler-Elder House |
| Happy Hollow Heights Historic District |
| Harcourt, James F., House |
| Harding and Miller Music Company |
| Harmony Way Bridge |
| Harrell, Dr. Samuel, House |
| Harriett |
| Harris, Bright B., House |
| Harry Evans Bridge |
| Hartford City Courthouse Square Historic District |
| Haskell and Barker Historic District |
| Haste-Crumpacker House |
| Haubstadt State Bank |
| Haven Hubbard Home |
| Haverstick, Hiram A., Farmstead |
| Haw Creek Leather Company |
| Hawley Heights Historic District |
| Hawthorne Branch Library No. 2 |
| Hay-Morrison House |
| Haynes, John and Dorothy, House |
| Hazelett, Richard M., House |
| HCS Motor Car Company |
| Heagy, D.W., Farm |
| Heath, David S., House |
| Heck-Hasler House |
| Hedden's Grove Historic District |
Data from United States Park Service and Wikidata
