Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Wabash and Erie Canal | Canal | 159 | Paulding | 40 12 18 N | 087 21 31 W |
| East Fork Whitewater River | Stream | | Preble | 39 24 40 N | 085 00 45 W |
| Limberlost Creek | Stream | | Mercer | 40 35 30 N | 084 56 40 W |
| Elkhorn Creek | Stream | | Preble | 39 45 50 N | 084 56 13 W |
| Jordon Creek | Stream | | Darke | 40 17 20 N | 084 50 24 W |
| Spring Run | Stream | | Preble | 39 52 56 N | 084 49 37 W |
| Hoover Run | Stream | | Darke | 40 08 48 N | 084 49 23 W |
| Mud Creek | Stream | | Darke | 39 54 01 N | 084 49 22 W |
| Cooper Run | Stream | | Hamilton | 39 16 13 N | 084 49 12 W |
| Harrison | Populated Place | 159 | Hamilton | 39 15 43 N | 084 49 12 W |
| Kolb Creek | Stream | | Hamilton | 39 16 11 N | 084 49 10 W |
| Harrison Post Office | Post Office | 159 | Hamilton | 39 15 45 N | 084 49 10 W |
| Middle Fork East Fork Whitewater River | Stream | | Darke | 39 56 50 N | 084 49 09 W |
| Phillips Creek | Stream | | Butler | 39 23 13 N | 084 49 04 W |
| Harrison Seventh Day Adventist Church | Church | | Hamilton | 39 15 38 N | 084 49 03 W |
| Fleisch Run | Stream | | Preble | 39 39 21 N | 084 49 03 W |
| First Christian Church | Church | | Hamilton | 39 15 48 N | 084 49 01 W |
| Mathew-Smith Cemetery | Cemetery | 299 | Butler | 39 25 40 N | 084 49 01 W |
| Scipio Cemetery | Cemetery | 262 | Butler | 39 23 27 N | 084 49 01 W |
| Toney Run | Stream | | Preble | 39 40 14 N | 084 49 00 W |
| First Presbyterian Church | Church | | Hamilton | 39 15 40 N | 084 48 58 W |
| Whitewater River | Stream | | Hamilton | 39 06 34 N | 084 48 57 W |
| College Creek | Stream | | Butler | 39 33 35 N | 084 48 54 W |
| Contreras Post Office (historical) | Post Office | 296 | Butler | 39 31 23 N | 084 48 54 W |
| First Baptist Church | Church | | Hamilton | 39 15 40 N | 084 48 53 W |
| Twentyseven Mile Creek | Stream | | Van Wert | 40 46 06 N | 084 48 52 W |
| College Corner | Populated Place | 299 | Preble | 39 34 03 N | 084 48 52 W |
| College Corner Union Elementary School | School | 302 | Preble | 39 34 19 N | 084 48 52 W |
| Great Miami River | Stream | | Hamilton | 39 06 31 N | 084 48 52 W |
| Saint John The Baptist Church | Church | | Hamilton | 39 15 46 N | 084 48 51 W |
| College Corner Post Office | Post Office | 300 | Butler | 39 34 05 N | 084 48 50 W |
| Bebb Park Bridge | Bridge | 232 | Butler | 39 22 53 N | 084 48 50 W |
| Sours Run | Stream | 228 | Butler | 39 22 24 N | 084 48 50 W |
| Saint John the Baptist School | School | 162 | Hamilton | 39 15 45 N | 084 48 50 W |
| Harrison Park Cemetery | Cemetery | 162 | Hamilton | 39 15 48 N | 084 48 49 W |
| Saint Johns Catholic Cemetery | Cemetery | 178 | Hamilton | 39 16 07 N | 084 48 47 W |
| Fort Hill Station | Locale | 151 | Hamilton | 39 06 52 N | 084 48 47 W |
| Fort Hill | Summit | 226 | Hamilton | 39 07 10 N | 084 48 45 W |
| Glen Haven Cemetery | Cemetery | 177 | Hamilton | 39 16 03 N | 084 48 43 W |
| Contreras | Populated Place | 293 | Butler | 39 31 25 N | 084 48 42 W |
| Harrison Elementary School | School | 161 | Hamilton | 39 15 37 N | 084 48 42 W |
| Contreras Post Office (historical) | Post Office | 292 | Butler | 39 31 25 N | 084 48 40 W |
| Woodlawn Cemetery | Cemetery | 173 | Hamilton | 39 16 00 N | 084 48 35 W |
| Miami River Public Access Site | Park | 139 | Hamilton | 39 06 36 N | 084 48 35 W |
| Othneil Looker Park | Park | 161 | Hamilton | 39 15 22 N | 084 48 34 W |
| Karn Branch | Stream | | Darke | 40 00 59 N | 084 48 31 W |
| Walker Church | Church | 304 | Butler | 39 27 28 N | 084 48 31 W |
| Sater Run | Stream | | Butler | 39 22 04 N | 084 48 31 W |
| Guards Island | Island | 140 | Hamilton | 39 07 53 N | 084 48 28 W |
| Pleasant Hill Cemetery | Cemetery | 335 | Preble | 39 54 31 N | 084 48 27 W |
| Township of Harrison | Civil | 186 | Hamilton | 39 15 38 N | 084 48 27 W |
| Elizabethtown Cemetery | Cemetery | 155 | Hamilton | 39 09 42 N | 084 48 26 W |
| Walker Chapel Cemetery | Cemetery | 301 | Butler | 39 27 28 N | 084 48 25 W |
| Elizabethtown Elementary School | School | 154 | Hamilton | 39 09 30 N | 084 48 25 W |
| Jameson Creek | Stream | | Hamilton | 39 14 07 N | 084 48 23 W |
| Union City | Populated Place | 338 | Darke | 40 11 58 N | 084 48 19 W |
| Union City City Hall | Building | 338 | Darke | 40 11 58 N | 084 48 19 W |
| Tumlin Lake | Reservoir | 168 | Hamilton | 39 11 12 N | 084 48 18 W |
| Tumlin Lake Dam | Dam | 168 | Hamilton | 39 11 12 N | 084 48 18 W |
| Elizabethtown | Populated Place | 150 | Hamilton | 39 09 31 N | 084 48 17 W |
| Dixon | Populated Place | 241 | Van Wert | 40 57 02 N | 084 48 16 W |
| Dixon Post Office (historical) | Post Office | | Van Wert | 40 57 00 N | 084 48 15 W |
| Crossroads Plaza Shopping Center | Locale | 186 | Hamilton | 39 15 33 N | 084 48 15 W |
| Elizabethtown Post Office (historical) | Post Office | 147 | Hamilton | 39 09 30 N | 084 48 15 W |
| Miami Fort Power Plant | Building | | Hamilton | 39 06 46 N | 084 48 14 W |
| Walters Ditch | Canal | 253 | Williams | 41 26 42 N | 084 48 14 W |
| Talawanda Springs | Populated Place | 298 | Preble | 39 34 44 N | 084 48 14 W |
| Melissa Ditch | Canal | 256 | Defiance | 41 20 23 N | 084 48 12 W |
| Evangelical United Methodist Church | Church | 335 | Darke | 40 12 03 N | 084 48 11 W |
| Gray Brook | Stream | 347 | Darke | 39 59 09 N | 084 48 11 W |
| State Line Ditch | Canal | 231 | Paulding | 41 00 52 N | 084 48 10 W |
| Willow Run | Stream | | Defiance | 41 22 26 N | 084 48 10 W |
| School Number 7 (historical) | School | 304 | Butler | 39 29 38 N | 084 48 09 W |
| Glen Karn Ditch | Canal | 351 | Darke | 40 00 52 N | 084 48 08 W |
| Peter Grube Ditch | Canal | 248 | Defiance | 41 24 25 N | 084 48 08 W |
| State Line Cemetery | Cemetery | 267 | Mercer | 40 31 40 N | 084 48 07 W |
| Baldwin | Populated Place | 233 | Paulding | 41 01 08 N | 084 48 07 W |
| Mississinawa Valley Elementary School | School | 336 | Darke | 40 12 03 N | 084 48 05 W |
| Rocky Fork | Stream | | Preble | 39 51 01 N | 084 48 05 W |
| Beam Bridge | Bridge | 339 | Preble | 39 48 08 N | 084 48 05 W |
| Tall Oaks Shopping Center | Locale | 179 | Hamilton | 39 15 22 N | 084 48 05 W |
| Streeter Ditch | Canal | 256 | Williams | 41 27 01 N | 084 48 04 W |
| School Number 6 (historical) | School | 306 | Butler | 39 29 42 N | 084 48 04 W |
| New Harrison (historical) | Populated Place | 226 | Paulding | 41 10 00 N | 084 48 03 W |
| Governor Bebb Preserve | Park | 231 | Butler | 39 22 00 N | 084 48 03 W |
| Locust Grove School (historical) | School | 224 | Hamilton | 39 11 54 N | 084 48 02 W |
| Sunbeam Prairie | Flat | 329 | Darke | 39 55 55 N | 084 48 01 W |
| Farnham Cemetery | Cemetery | 259 | Williams | 41 27 59 N | 084 48 01 W |
| WBNN-FM (Union City) | Tower | 327 | Darke | 40 11 32 N | 084 47 58 W |
| Clemens Cemetery | Cemetery | 356 | Darke | 40 04 53 N | 084 47 57 W |
| Tampico School (historical) | School | 357 | Darke | 40 03 24 N | 084 47 57 W |
| Interchange 1 | Crossing | 181 | Hamilton | 39 15 37 N | 084 47 56 W |
| Long Post Office (historical) | Post Office | 357 | Darke | 40 04 40 N | 084 47 55 W |
| School Number 4 (historical) | School | 289 | Butler | 39 25 51 N | 084 47 55 W |
| School Number 9 (historical) | School | 284 | Butler | 39 24 22 N | 084 47 55 W |
| Long | Populated Place | 357 | Darke | 40 04 41 N | 084 47 53 W |
| Cornell Ditch | Canal | 262 | Williams | 41 29 25 N | 084 47 53 W |
| School Number 3 (historical) | School | 280 | Butler | 39 27 53 N | 084 47 53 W |
| White Ditch | Canal | 228 | Paulding | 41 01 48 N | 084 47 52 W |
| Bass Cemetery | Cemetery | 359 | Darke | 40 03 50 N | 084 47 52 W |
| Union City Cemetery (historical) | Cemetery | 336 | Darke | 40 12 04 N | 084 47 51 W |
| Westgate Terminal | Locale | 299 | Williams | 41 37 47 N | 084 47 51 W |
| Dark Hollow | Valley | | Hamilton | 39 06 50 N | 084 47 51 W |
| Spring Hill Cemetery | Cemetery | 283 | Mercer | 40 24 49 N | 084 47 50 W |
| Chapel Cemetery | Cemetery | 357 | Darke | 40 01 56 N | 084 47 50 W |
| Dobson School (historical) | School | 352 | Darke | 40 01 11 N | 084 47 50 W |
| Scherman Ditch | Canal | 261 | Mercer | 40 32 06 N | 084 47 49 W |
| Billingstown Cemetery | Cemetery | 317 | Williams | 41 41 22 N | 084 47 49 W |
| Upper Wabash Number Three Pond | Reservoir | 290 | Mercer | 40 23 36 N | 084 47 48 W |
| Upper Wabash Number Three Pond Dam | Dam | 290 | Mercer | 40 23 36 N | 084 47 48 W |