Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Wayne Hospital | Hospital | 319 | Darke | 40 05 18 N | 084 38 05 W |
| Wayne Lakes Cemetery | Cemetery | 331 | Darke | 40 00 56 N | 084 39 29 W |
| Wayne Lakes Park | Populated Place | 319 | Darke | 40 01 23 N | 084 39 43 W |
| WBNN-FM (Union City) | Tower | 327 | Darke | 40 11 32 N | 084 47 58 W |
| Weavers | Populated Place | 326 | Darke | 40 01 35 N | 084 40 42 W |
| Weavers Station Post Office (historical) | Post Office | 323 | Darke | 40 01 35 N | 084 40 40 W |
| Webster | Populated Place | 294 | Darke | 40 11 12 N | 084 28 41 W |
| Webster Cemetery | Cemetery | 330 | Darke | 40 16 45 N | 084 40 33 W |
| Webster Post Office (historical) | Post Office | 298 | Darke | 40 11 10 N | 084 28 40 W |
| Webster United Methodist Church | Church | 294 | Darke | 40 11 12 N | 084 28 34 W |
| Weimers Mill | Locale | 315 | Darke | 40 07 16 N | 084 40 38 W |
| Welker Lateral | Canal | 347 | Darke | 39 57 07 N | 084 42 13 W |
| West Branch Cemetery | Cemetery | 329 | Darke | 40 03 01 N | 084 42 14 W |
| West Branch Greenville Creek | Stream | | Darke | 40 07 05 N | 084 40 31 W |
| West Grove Church | Church | 308 | Darke | 40 01 25 N | 084 26 51 W |
| West Zion Cemetery | Cemetery | 329 | Darke | 40 02 28 N | 084 42 23 W |
| West Zion Church | Church | 329 | Darke | 40 02 30 N | 084 42 22 W |
| Westmont High School | School | 352 | Darke | 39 59 46 N | 084 47 37 W |
| WGVO-FM (Greenville) | Tower | 320 | Darke | 40 05 56 N | 084 37 60 W |
| White Springs Golf Course | Locale | 315 | Darke | 40 07 07 N | 084 40 10 W |
| Wiley (historical) | Populated Place | 332 | Darke | 39 56 00 N | 084 45 51 W |
| Wiley Post Office (historical) | Post Office | 333 | Darke | 39 56 00 N | 084 45 50 W |
| Willowdell | Populated Place | 303 | Darke | 40 18 23 N | 084 27 14 W |
| Willowdell Cemetery | Cemetery | 303 | Darke | 40 18 24 N | 084 26 22 W |
| Willowdell Post Office (historical) | Post Office | 302 | Darke | 40 18 25 N | 084 27 15 W |
| Willowdell School (historical) | School | 299 | Darke | 40 18 48 N | 084 27 13 W |
| Wilt Cemetery | Cemetery | 350 | Darke | 39 56 55 N | 084 41 57 W |
| WLSN-FM (Greenville) | Tower | 315 | Darke | 40 08 49 N | 084 36 36 W |
| Woodington | Populated Place | 314 | Darke | 40 10 42 N | 084 40 40 W |
| Woodington Congregational Christian Church | Church | 314 | Darke | 40 10 41 N | 084 40 40 W |
| Woodington Park Post Office (historical) | Post Office | 314 | Darke | 40 10 40 N | 084 40 40 W |
| Woodington Run | Stream | | Darke | 40 12 58 N | 084 38 58 W |
| Woodland Heights Elementary School | School | 318 | Darke | 40 08 14 N | 084 38 19 W |
| Worch Memorial Public Library | Building | 300 | Darke | 40 13 23 N | 084 28 56 W |
| Yankeetown | Populated Place | 360 | Darke | 39 55 47 N | 084 43 20 W |
| Yankeetown Cemetery | Cemetery | 357 | Darke | 39 56 08 N | 084 43 23 W |
| Yankeetown Post Office (historical) | Post Office | 361 | Darke | 39 55 45 N | 084 43 20 W |
| Yoder Cemetery | Cemetery | 307 | Darke | 40 15 34 N | 084 27 38 W |
| Yorkshire | Populated Place | 299 | Darke | 40 19 31 N | 084 29 44 W |
| Yorkshire Post Office (historical) | Post Office | 299 | Darke | 40 19 30 N | 084 29 45 W |
| Zerby Cemetery | Cemetery | 329 | Darke | 40 17 09 N | 084 41 23 W |
| Zion Pilgrim Church | Church | 324 | Darke | 40 16 53 N | 084 41 10 W |
| Zumbrum Corners | Locale | 317 | Darke | 40 14 40 N | 084 44 50 W |
| Adams Ridge | Populated Place | 224 | Defiance | 41 23 55 N | 084 15 56 W |
| Adams Ridge Post Office (historical) | Post Office | 224 | Defiance | 41 23 55 N | 084 15 55 W |
| Agape Lighthouse Church | Church | 210 | Defiance | 41 17 07 N | 084 22 07 W |
| Amaden Ditch | Canal | 253 | Defiance | 41 22 42 N | 084 47 03 W |
| Anthony Wayne Elementary School | School | 214 | Defiance | 41 15 37 N | 084 23 24 W |
| Apostolic United Pentecostal Church | Church | 216 | Defiance | 41 17 40 N | 084 21 57 W |
| Arend Airport | Airport | 218 | Defiance | 41 15 25 N | 084 38 30 W |
| Ashwood (historical) | Populated Place | 218 | Defiance | 41 15 21 N | 084 27 26 W |
| Ashwood Post Office (historical) | Post Office | 218 | Defiance | 41 15 20 N | 084 27 25 W |
| Assembly of God Church | Church | 229 | Defiance | 41 17 20 N | 084 45 52 W |
| Auglaize River | Stream | | Defiance | 41 17 15 N | 084 21 21 W |
| Ayersville | Populated Place | 223 | Defiance | 41 14 19 N | 084 17 08 W |
| Ayersville Elementary School | School | 223 | Defiance | 41 14 12 N | 084 17 05 W |
| Ayersville High School | School | 223 | Defiance | 41 14 15 N | 084 17 05 W |
| Ayersville Post Office (historical) | Post Office | 223 | Defiance | 41 14 20 N | 084 17 10 W |
| Ayersville United Methodist Church | Church | 225 | Defiance | 41 14 18 N | 084 16 58 W |
| Barnes Creek | Stream | | Defiance | 41 20 50 N | 084 13 41 W |
| Beetree Run | Stream | | Defiance | 41 14 06 N | 084 24 16 W |
| Bethel Christian Assembly Church | Church | 210 | Defiance | 41 17 07 N | 084 21 41 W |
| Bethel Spanish Church | Church | 216 | Defiance | 41 17 40 N | 084 21 57 W |
| Bethlehem Evangelical Lutheran Church | Church | 213 | Defiance | 41 22 12 N | 084 13 43 W |
| Bethlehem Lutheran Cemetery | Cemetery | 224 | Defiance | 41 24 17 N | 084 15 39 W |
| Bethlehem Lutheran Church | Church | 224 | Defiance | 41 24 19 N | 084 15 39 W |
| Big Lake | Lake | 253 | Defiance | 41 24 41 N | 084 43 39 W |
| Big Run | Stream | 246 | Defiance | 41 25 10 N | 084 46 55 W |
| Black Creek | Stream | | Defiance | 41 22 03 N | 084 26 56 W |
| Blair Cemetery | Cemetery | 215 | Defiance | 41 16 04 N | 084 32 37 W |
| Blevins Airport | Airport | 221 | Defiance | 41 12 26 N | 084 16 11 W |
| Brickell Elementary School | School | 212 | Defiance | 41 16 56 N | 084 21 03 W |
| Bronson Park | Park | 208 | Defiance | 41 15 21 N | 084 23 33 W |
| Brunersburg | Populated Place | 210 | Defiance | 41 18 24 N | 084 23 13 W |
| Brunersburg Cemetery | Cemetery | 215 | Defiance | 41 18 28 N | 084 22 55 W |
| Brunersburg Post Office (historical) | Post Office | 211 | Defiance | 41 18 25 N | 084 23 15 W |
| Buckskin Creek | Stream | | Defiance | 41 19 10 N | 084 24 30 W |
| Camp Lacota | Locale | 213 | Defiance | 41 15 23 N | 084 22 48 W |
| Camp Lakota Boy Scout Lake | Reservoir | 204 | Defiance | 41 15 00 N | 084 22 48 W |
| Camp Lakota Boy Scout Lake Dam | Dam | 204 | Defiance | 41 15 00 N | 084 22 48 W |
| Case School (historical) | School | 219 | Defiance | 41 21 15 N | 084 35 31 W |
| Catholic Cemetery (historical) | Cemetery | 215 | Defiance | 41 16 41 N | 084 23 05 W |
| Central School (historical) | School | 213 | Defiance | 41 16 52 N | 084 21 56 W |
| Chapman School (historical) | School | 256 | Defiance | 41 22 59 N | 084 42 37 W |
| Church of Christ | Church | 214 | Defiance | 41 15 32 N | 084 23 32 W |
| Church of God | Church | 219 | Defiance | 41 16 54 N | 084 20 01 W |
| Cicero (historical) | Populated Place | 239 | Defiance | 41 20 22 N | 084 42 34 W |
| Cicero Post Office (historical) | Post Office | 239 | Defiance | 41 20 20 N | 084 42 35 W |
| Clarksville (historical) | Populated Place | 253 | Defiance | 41 25 20 N | 084 46 05 W |
| Clarksville Bridge | Bridge | 248 | Defiance | 41 25 20 N | 084 46 23 W |
| Clarksville School (historical) | School | 258 | Defiance | 41 24 42 N | 084 46 04 W |
| Coffin School (historical) | School | 217 | Defiance | 41 16 03 N | 084 33 15 W |
| Colby Cemetery | Cemetery | 214 | Defiance | 41 15 12 N | 084 35 43 W |
| Community Memorial Hospital | Hospital | 232 | Defiance | 41 18 02 N | 084 45 24 W |
| Compo Park | Park | 215 | Defiance | 41 16 25 N | 084 21 11 W |
| Coon Creek | Stream | | Defiance | 41 25 27 N | 084 23 15 W |
| Crary School (historical) | School | 244 | Defiance | 41 21 15 N | 084 42 33 W |
| Cromley Cemetery | Cemetery | 212 | Defiance | 41 13 50 N | 084 25 11 W |
| Crooked Creek | Stream | | Defiance | 41 23 07 N | 084 40 37 W |
| Defiance | Populated Place | 206 | Defiance | 41 17 04 N | 084 21 21 W |
| Defiance Church of the Brethren | Church | 206 | Defiance | 41 17 04 N | 084 21 31 W |
| Defiance Church of the Nazarene | Church | 217 | Defiance | 41 15 52 N | 084 22 11 W |
| Defiance College | School | 218 | Defiance | 41 17 47 N | 084 21 34 W |
| Defiance County | Civil | 216 | Defiance | 41 20 00 N | 084 27 00 W |
| Defiance County Children Home Cemetery | Cemetery | 212 | Defiance | 41 20 45 N | 084 25 17 W |
| Defiance County Childrens Home | Building | 218 | Defiance | 41 16 59 N | 084 20 16 W |
| Defiance County Courthouse | Building | 209 | Defiance | 41 17 12 N | 084 21 42 W |
| Defiance County Fairgrounds | Park | 228 | Defiance | 41 17 24 N | 084 45 21 W |
| Defiance County Home | Building | 213 | Defiance | 41 20 32 N | 084 25 01 W |
| Defiance County Home Cemetery | Cemetery | 214 | Defiance | 41 20 25 N | 084 25 18 W |