Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Garfield High School | School | 149 | Vigo | 39 29 34 N | 087 24 00 W |
| Garfield Park | Park | 221 | Marion | 39 43 59 N | 086 08 50 W |
| Garfield Park Baptist Church | Church | 222 | Marion | 39 43 48 N | 086 08 24 W |
| Garfield School | School | 192 | Bartholomew | 39 12 40 N | 085 54 18 W |
| Garfield School | School | 279 | Jay | 40 26 13 N | 084 58 21 W |
| Garfield Special School | School | 187 | LaPorte | 41 42 35 N | 086 54 20 W |
| Garland Brook Cemetery | Cemetery | 193 | Bartholomew | 39 12 24 N | 085 53 32 W |
| Garland Cemetery | Cemetery | 174 | Dubois | 38 17 57 N | 086 41 45 W |
| Garnand Cemetery | Cemetery | 232 | Miami | 40 41 06 N | 086 08 31 W |
| Garner Public School (historical) | School | 233 | Porter | 41 28 08 N | 087 03 54 W |
| Garnett School | School | 187 | Lake | 41 34 47 N | 087 20 36 W |
| Garr Hill | Summit | 288 | Franklin | 39 28 27 N | 084 57 31 W |
| Garrard Church | Church | 223 | Owen | 39 20 38 N | 086 54 16 W |
| Garrard Ditch | Canal | 200 | Newton | 40 52 32 N | 087 29 53 W |
| Garrett | Populated Place | 268 | DeKalb | 41 20 58 N | 085 08 08 W |
| Garrett Cemetery | Cemetery | 269 | Boone | 40 09 48 N | 086 27 11 W |
| Garrett City Ditch | Canal | 265 | DeKalb | 41 20 20 N | 085 07 43 W |
| Garrett Creek | Stream | | Spencer | 37 52 38 N | 087 04 24 W |
| Garrett Ditch | Canal | 260 | DeKalb | 41 20 28 N | 085 05 45 W |
| Garrett High School | School | 269 | DeKalb | 41 20 53 N | 085 07 38 W |
| Garrison Cemetery | Cemetery | 150 | Warrick | 38 06 26 N | 087 07 09 W |
| Garrison Cemetery | Cemetery | 257 | Whitley | 41 10 51 N | 085 23 47 W |
| Garrison Chapel | Church | 286 | Monroe | 39 08 58 N | 086 38 36 W |
| Garrison Chapel | Church | 160 | Warrick | 38 09 30 N | 087 06 48 W |
| Garrison Creek | Stream | | Franklin | 39 31 15 N | 085 10 24 W |
| Garrison Creek Church | Church | 255 | Fayette | 39 33 07 N | 085 13 12 W |
| Garvin Park | Park | 112 | Vanderburgh | 37 59 45 N | 087 33 50 W |
| Garvin Park | Park | 112 | Vanderburgh | 37 59 45 N | 087 33 49 W |
| Garwood Memorial Airport | Airport | 207 | White | 40 52 30 N | 086 52 00 W |
| Gary | Populated Place | 183 | Lake | 41 35 36 N | 087 20 47 W |
| Gary Christian Center | Church | 188 | Lake | 41 33 05 N | 087 20 10 W |
| Gary City Center Historic District | Park | 183 | Lake | 41 36 00 N | 087 20 15 W |
| Gary Fire Station Number 1 | Building | 183 | Lake | 41 36 09 N | 087 20 03 W |
| Gary Fire Station Number 10 | Building | 181 | Lake | 41 33 28 N | 087 19 44 W |
| Gary Fire Station Number 11 | Building | 182 | Lake | 41 37 03 N | 087 14 29 W |
| Gary Fire Station Number 12 | Building | 185 | Lake | 41 35 01 N | 087 19 02 W |
| Gary Fire Station Number 2 | Building | 184 | Lake | 41 35 10 N | 087 20 21 W |
| Gary Fire Station Number 3 | Building | 182 | Lake | 41 35 26 N | 087 21 51 W |
| Gary Fire Station Number 4 | Building | 184 | Lake | 41 34 25 N | 087 20 29 W |
| Gary Fire Station Number 5 | Building | 192 | Lake | 41 32 38 N | 087 20 15 W |
| Gary Fire Station Number 6 | Building | 182 | Lake | 41 36 06 N | 087 21 08 W |
| Gary Fire Station Number 7 | Building | 186 | Lake | 41 36 05 N | 087 15 41 W |
| Gary Fire Station Number 8 | Building | 183 | Lake | 41 36 08 N | 087 22 20 W |
| Gary Fire Station Number 9 | Building | 182 | Lake | 41 35 50 N | 087 23 37 W |
| Gary General Hospital (historical) | Hospital | 184 | Lake | 41 35 46 N | 087 20 45 W |
| Gary Harbor | Bay | 175 | Lake | 41 37 31 N | 087 19 18 W |
| Gary Harbor Breakwater Light | Locale | 175 | Lake | 41 37 48 N | 087 19 13 W |
| Gary Harbor Bulkhead Light | Locale | 175 | Lake | 41 37 26 N | 087 17 20 W |
| Gary Harbor East Pierhead Light | Locale | 175 | Lake | 41 37 29 N | 087 19 28 W |
| Gary Harbor West Pierhead Light | Locale | 176 | Lake | 41 37 29 N | 087 19 30 W |
| Gary Main Post Office | Post Office | 185 | Lake | 41 35 17 N | 087 18 59 W |
| Gary Municipal Airport | Airport | 179 | Lake | 41 37 00 N | 087 24 37 W |
| Gary Public Library | Building | 183 | Lake | 41 36 09 N | 087 20 25 W |
| Gary Public Schools Memorial Auditorium | Building | 184 | Lake | 41 35 52 N | 087 20 11 W |
| Gary School | School | 197 | Lake | 41 31 47 N | 087 21 01 W |
| Gary Stotts Drain | Stream | | Wells | 40 35 56 N | 085 21 20 W |
| Gary Tabernacle First Baptist Church (historical) | Church | 185 | Lake | 41 34 30 N | 087 21 05 W |
| Gary United Pentecostal Apostolic Church (historical) | Church | 195 | Lake | 41 32 11 N | 087 19 39 W |
| Garyton | Populated Place | 195 | Porter | 41 34 11 N | 087 12 37 W |
| Gas City | Populated Place | 261 | Grant | 40 29 14 N | 085 36 47 W |
| Gasburg | Populated Place | 259 | Morgan | 39 35 40 N | 086 26 13 W |
| Gash Branch | Stream | | Morgan | 39 32 59 N | 086 36 13 W |
| Gaskill Bridge | Bridge | 265 | DeKalb | 41 30 52 N | 084 51 14 W |
| Gast Ditch | Canal | 250 | Fulton | 41 03 34 N | 086 04 03 W |
| Gast Ditch | Canal | 235 | St. Joseph | 41 43 43 N | 086 04 34 W |
| Gaston | Populated Place | 270 | Delaware | 40 18 50 N | 085 30 02 W |
| Gaston Elementary School | School | 271 | Delaware | 40 18 52 N | 085 29 57 W |
| Gaston Hill | Summit | 266 | Owen | 39 21 10 N | 086 48 48 W |
| Gatchel | Populated Place | 218 | Perry | 38 02 48 N | 086 39 02 W |
| Gatchel Pond | Lake | 199 | Perry | 38 03 19 N | 086 38 33 W |
| Gater Cemetery | Cemetery | 244 | Washington | 38 44 13 N | 086 04 29 W |
| Gates Corner | Populated Place | 320 | Delaware | 40 06 22 N | 085 15 10 W |
| Gates Corner | Populated Place | 229 | Porter | 41 25 13 N | 087 07 26 W |
| Gates Creek | Stream | | Franklin | 39 25 40 N | 085 07 13 W |
| Gates Ditch | Canal | 249 | Adams | 40 40 50 N | 084 53 49 W |
| Gates Ditch | Canal | 294 | Rush | 39 36 55 N | 085 30 43 W |
| Gatesville | Populated Place | 199 | Brown | 39 15 42 N | 086 08 47 W |
| Gateway Church | Church | 120 | Warrick | 37 58 54 N | 087 24 19 W |
| Gateway Park | Park | 183 | Lake | 41 36 16 N | 087 20 15 W |
| Gault Ditch | Canal | 235 | Cass | 40 52 25 N | 086 19 40 W |
| Gavit School | School | 184 | Lake | 41 34 36 N | 087 29 10 W |
| Gaylord Stark Lake | Reservoir | 233 | Jennings | 38 58 12 N | 085 33 24 W |
| Gaylord Stark Lake Dam | Dam | 233 | Jennings | 38 58 12 N | 085 33 24 W |
| Gaynor Ridge | Ridge | 282 | Dearborn | 39 15 19 N | 084 54 50 W |
| Gaynorsville | Populated Place | 267 | Decatur | 39 14 34 N | 085 31 12 W |
| Gearhart Ditch | Canal | 209 | Starke | 41 21 37 N | 086 36 35 W |
| Geetings Ditch | Canal | 231 | Cass | 40 35 20 N | 086 16 26 W |
| Geetingsville | Populated Place | 250 | Clinton | 40 24 59 N | 086 28 07 W |
| Gehring and Gumz Ditch | Canal | 206 | Jasper | 41 03 06 N | 086 59 19 W |
| Gehring and Gumz Ditch | Populated Place | 272 | Madison | 40 14 04 N | 085 34 42 W |
| Gehring Ditch | Canal | 206 | Jasper | 41 03 40 N | 087 00 27 W |
| Geiger Ridge Pond | Lake | 228 | Monroe | 39 00 28 N | 086 21 47 W |
| Geising Cemetery | Cemetery | 269 | Elkhart | 41 39 11 N | 085 45 13 W |
| Geist Reservoir | Reservoir | 242 | Marion | 39 54 36 N | 085 59 12 W |
| Geist Reservoir Dam | Dam | 242 | Marion | 39 54 36 N | 085 59 12 W |
| Geller Ditch | Canal | 253 | Allen | 41 12 18 N | 085 11 19 W |
| Gellersen Center | Building | 241 | Porter | 41 27 46 N | 087 02 16 W |
| Gem | Populated Place | 261 | Hancock | 39 46 46 N | 085 53 48 W |
| Gem City Park | Park | 256 | Clinton | 40 17 28 N | 086 30 13 W |
| Gem Creek | Stream | | Boone | 39 58 54 N | 086 16 21 W |
| Gem Island | Island | 280 | Noble | 41 29 53 N | 085 22 22 W |
| Gemco Lake | Reservoir | 272 | Franklin | 39 27 06 N | 085 12 30 W |
| Gemco Lake Dam | Dam | 272 | Franklin | 39 27 06 N | 085 12 30 W |
| Gene Stratton Porter Hall | Building | 184 | Lake | 41 35 07 N | 087 28 23 W |
| Gene Stratton Porter State Memorial | Park | 289 | Noble | 41 28 50 N | 085 20 57 W |
| General Shanks Elementary School | School | 280 | Jay | 40 25 24 N | 084 58 38 W |
| Genesis Convention Center | Building | 183 | Lake | 41 36 10 N | 087 20 20 W |
| Geneva | Populated Place | 259 | Adams | 40 35 31 N | 084 57 26 W |
| Geneva | Populated Place | 231 | Shelby | 39 23 30 N | 085 43 12 W |
| Geneva Elementary School | School | 257 | Adams | 40 35 32 N | 084 57 42 W |