Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Friendship Community Church | Church | 353 | Darke | 39 56 46 N | 084 46 41 W |
| Frys Corners | Populated Place | 326 | Darke | 40 02 53 N | 084 37 50 W |
| Garst Museum | Building | 316 | Darke | 40 06 26 N | 084 38 12 W |
| German Church | Church | 308 | Darke | 40 02 11 N | 084 26 43 W |
| Gettysburg | Populated Place | 302 | Darke | 40 06 41 N | 084 29 43 W |
| Gettysburg Elementary School | School | 308 | Darke | 40 06 48 N | 084 29 35 W |
| Gettysburg Post Office | Post Office | 301 | Darke | 40 06 40 N | 084 29 45 W |
| Glen Karn | Populated Place | 352 | Darke | 40 00 35 N | 084 47 31 W |
| Glen Karn Ditch | Canal | 351 | Darke | 40 00 52 N | 084 48 08 W |
| Glenkarn Post Office (historical) | Post Office | 352 | Darke | 40 00 35 N | 084 47 30 W |
| Gordon | Populated Place | 318 | Darke | 39 55 50 N | 084 30 31 W |
| Gordon Cemetery | Cemetery | 318 | Darke | 39 55 42 N | 084 30 23 W |
| Gordon Post Office | Post Office | 318 | Darke | 39 55 50 N | 084 30 30 W |
| Grace Lutheran Church | Church | 317 | Darke | 40 06 22 N | 084 37 46 W |
| Grassy Fork | Stream | | Darke | 40 16 53 N | 084 29 22 W |
| Gray Branch | Stream | | Darke | 40 17 24 N | 084 46 59 W |
| Gray Brook | Stream | 347 | Darke | 39 59 09 N | 084 48 11 W |
| Greenlawn Cemetery | Cemetery | 298 | Darke | 40 13 30 N | 084 29 26 W |
| Greenmound Cemetery | Cemetery | 342 | Darke | 39 57 46 N | 084 42 19 W |
| Greenville | Populated Place | 318 | Darke | 40 06 10 N | 084 37 59 W |
| Greenville Cemetery | Cemetery | 317 | Darke | 40 06 30 N | 084 38 37 W |
| Greenville Church of the Brethren | Church | 317 | Darke | 40 05 42 N | 084 38 01 W |
| Greenville City Hall | Building | 318 | Darke | 40 06 10 N | 084 38 04 W |
| Greenville City Park | Park | 311 | Darke | 40 06 43 N | 084 37 44 W |
| Greenville Country Club | Locale | 316 | Darke | 40 06 08 N | 084 33 23 W |
| Greenville High School | School | 314 | Darke | 40 06 52 N | 084 37 58 W |
| Greenville Industrial Park | Locale | 314 | Darke | 40 05 18 N | 084 35 26 W |
| Greenville Junior High School | School | 319 | Darke | 40 05 54 N | 084 38 01 W |
| Greenville Post Office | Post Office | 318 | Darke | 40 06 10 N | 084 37 57 W |
| Greenville Public Library | Building | 319 | Darke | 40 05 57 N | 084 37 58 W |
| Greenville Shopping Center | Locale | 314 | Darke | 40 08 12 N | 084 36 46 W |
| Greenville South Broadway Commercial Historic District | Park | 319 | Darke | 40 06 03 N | 084 37 56 W |
| Greenville Water Works | Building | 311 | Darke | 40 06 10 N | 084 38 53 W |
| Grossnickle Ditch | Canal | 329 | Darke | 39 56 32 N | 084 38 28 W |
| Harte Run | Stream | | Darke | 40 08 42 N | 084 37 11 W |
| Harter Cemetery | Cemetery | 335 | Darke | 39 58 29 N | 084 41 42 W |
| Hartle Cemetery | Cemetery | 300 | Darke | 40 11 29 N | 084 32 57 W |
| Hazeldale School (historical) | School | 305 | Darke | 40 10 50 N | 084 32 27 W |
| Heller Cemetery | Cemetery | 326 | Darke | 40 05 58 N | 084 42 26 W |
| Heller Ditch | Canal | 310 | Darke | 40 03 51 N | 084 30 53 W |
| Heller School (historical) | School | 310 | Darke | 40 01 16 N | 084 29 17 W |
| Henry Saint Clair Memorial Building | Building | 320 | Darke | 40 05 56 N | 084 37 60 W |
| Hetslerville Post Office (historical) | Post Office | 318 | Darke | 40 12 20 N | 084 43 40 W |
| Hetzlerville (historical) | Populated Place | 318 | Darke | 40 12 19 N | 084 43 41 W |
| Hewitt | Populated Place | 335 | Darke | 39 59 21 N | 084 40 59 W |
| Hickory Grove Church | Church | 328 | Darke | 40 04 55 N | 084 41 28 W |
| Hiestand Church | Church | 320 | Darke | 40 18 04 N | 084 40 30 W |
| Hiestand Community Hall | Locale | 323 | Darke | 40 18 30 N | 084 40 04 W |
| Hill Grove | Populated Place | 329 | Darke | 40 10 39 N | 084 46 06 W |
| Hillgrove Cemetery | Cemetery | 328 | Darke | 40 10 45 N | 084 46 15 W |
| Hillgrove Federated Church | Church | 331 | Darke | 40 10 43 N | 084 45 58 W |
| Hillgrove Post Office (historical) | Post Office | 329 | Darke | 40 10 40 N | 084 46 05 W |
| Hills of Judea | Summit | 328 | Darke | 40 00 10 N | 084 40 46 W |
| Hollansburg | Populated Place | 354 | Darke | 39 59 49 N | 084 47 32 W |
| Hollansburg Cemetery | Cemetery | 356 | Darke | 39 59 55 N | 084 47 24 W |
| Hollansburg Post Office | Post Office | 354 | Darke | 39 59 50 N | 084 47 30 W |
| Holsapple Cemetery | Cemetery | 301 | Darke | 40 20 04 N | 084 36 34 W |
| Holsapple School (historical) | School | 332 | Darke | 39 57 38 N | 084 36 57 W |
| Holy Family Catholic Church | Church | 313 | Darke | 40 14 46 N | 084 31 26 W |
| Honsapple Ditch | Canal | 295 | Darke | 40 20 23 N | 084 33 35 W |
| Hoover Cemetery | Cemetery | 299 | Darke | 40 12 22 N | 084 29 38 W |
| Hoover Run | Stream | | Darke | 40 08 48 N | 084 49 23 W |
| Hopper School (historical) | School | 308 | Darke | 40 14 34 N | 084 41 36 W |
| Horatio | Populated Place | 308 | Darke | 40 08 58 N | 084 31 30 W |
| Horatio Post Office (historical) | Post Office | 308 | Darke | 40 09 00 N | 084 31 30 W |
| Horn Ditch | Canal | 350 | Darke | 40 01 33 N | 084 47 25 W |
| Horney School (historical) | School | 310 | Darke | 40 16 56 N | 084 47 07 W |
| Hoschover Cemetery | Cemetery | 316 | Darke | 40 15 47 N | 084 37 60 W |
| Hunchberger Corners | Populated Place | 317 | Darke | 40 13 20 N | 084 44 48 W |
| Immanuel Baptist Church | Church | 321 | Darke | 39 59 23 N | 084 33 35 W |
| Indian Creek | Stream | | Darke | 40 13 21 N | 084 29 27 W |
| Indian Creek Park | Park | 300 | Darke | 40 13 48 N | 084 29 36 W |
| Ithaca | Populated Place | 315 | Darke | 39 56 14 N | 084 33 12 W |
| Ithaca Cemetery | Cemetery | 319 | Darke | 39 56 35 N | 084 33 35 W |
| Ithaca Lutheran Cemetery | Cemetery | 315 | Darke | 39 56 08 N | 084 33 06 W |
| Ithaca Post Office (historical) | Post Office | 315 | Darke | 39 56 15 N | 084 33 10 W |
| Ithaca United Methodist Church | Church | 316 | Darke | 39 56 22 N | 084 33 10 W |
| Jaysville | Populated Place | 323 | Darke | 40 02 53 N | 084 35 57 W |
| Jaysville Post Office (historical) | Post Office | 324 | Darke | 40 02 55 N | 084 35 55 W |
| Jordon Creek | Stream | | Darke | 40 17 20 N | 084 50 24 W |
| Karn Branch | Stream | | Darke | 40 00 59 N | 084 48 31 W |
| Kershner Cemetery | Cemetery | 317 | Darke | 40 13 57 N | 084 36 25 W |
| Kingdom Hall of Jehovahs Witnesses | Church | 317 | Darke | 40 06 27 N | 084 38 17 W |
| Kraut Creek | Stream | | Darke | 40 08 55 N | 084 44 33 W |
| Lake Branch Ditch | Canal | 323 | Darke | 40 01 00 N | 084 41 38 W |
| Lakeview School (historical) | School | 340 | Darke | 39 59 35 N | 084 43 26 W |
| Landis | Populated Place | 313 | Darke | 40 03 15 N | 084 30 11 W |
| Landis Post Office (historical) | Post Office | 312 | Darke | 40 03 15 N | 084 30 10 W |
| Lansdowne Landing Strip | Airport | 315 | Darke | 40 05 21 N | 084 35 52 W |
| Leis Airport | Airport | 309 | Darke | 40 12 21 N | 084 39 42 W |
| Lightsville | Populated Place | 317 | Darke | 40 17 07 N | 084 42 46 W |
| Lightsville Post Office (historical) | Post Office | 317 | Darke | 40 17 05 N | 084 42 45 W |
| Long | Populated Place | 357 | Darke | 40 04 41 N | 084 47 53 W |
| Long Post Office (historical) | Post Office | 357 | Darke | 40 04 40 N | 084 47 55 W |
| Lyons School (historical) | School | 315 | Darke | 40 14 09 N | 084 36 07 W |
| Manuel Cemetery | Cemetery | 322 | Darke | 40 07 46 N | 084 42 25 W |
| Maple Swamp Ditch | Canal | 329 | Darke | 39 57 44 N | 084 38 29 W |
| Maplegrove School (historical) | School | 308 | Darke | 40 14 11 N | 084 38 19 W |
| Marland Peat Pits | Mine | 328 | Darke | 39 59 25 N | 084 43 02 W |
| Martin Cemetery | Cemetery | 313 | Darke | 40 05 21 N | 084 34 12 W |
| McClure School (historical) | School | 327 | Darke | 40 08 08 N | 084 45 03 W |
| McFarland Cemetery | Cemetery | 324 | Darke | 40 13 16 N | 084 46 38 W |
| McQuay Ditch | Canal | 311 | Darke | 40 04 42 N | 084 32 01 W |
| Meeker | Locale | 314 | Darke | 40 10 15 N | 084 38 48 W |
| Mendenhall Cemetery | Cemetery | 302 | Darke | 40 19 15 N | 084 29 52 W |
| Middle Fork East Fork Whitewater River | Stream | | Darke | 39 56 50 N | 084 49 09 W |
| Midway | Populated Place | 313 | Darke | 39 57 20 N | 084 27 53 W |
| Miller Cemetery | Cemetery | 298 | Darke | 40 09 08 N | 084 28 12 W |
| Miller Cemetery | Cemetery | 334 | Darke | 40 03 19 N | 084 43 39 W |
| Miller Grove | Populated Place | 310 | Darke | 40 00 24 N | 084 27 51 W |