Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Delaware County | Civil | 290 | Delaware | 40 16 00 N | 083 00 01 W |
| Delaware County Courthouse | Building | 274 | Delaware | 40 18 07 N | 083 04 05 W |
| Delaware County Cultural Arts Center | Building | 272 | Delaware | 40 18 01 N | 083 04 33 W |
| Delaware County Fairgrounds | Locale | 280 | Delaware | 40 19 00 N | 083 04 30 W |
| Delaware County Home | Building | 290 | Delaware | 40 19 56 N | 082 58 29 W |
| Delaware County Jail | Building | 284 | Delaware | 40 18 44 N | 083 02 53 W |
| Delaware County Law Library | Building | 274 | Delaware | 40 18 07 N | 083 04 05 W |
| Delaware County Library | Building | 263 | Delaware | 40 17 59 N | 083 03 52 W |
| Delaware Creek | Stream | | Lucas | 41 36 35 N | 083 35 26 W |
| Delaware Dam | Dam | 275 | Delaware | 40 21 31 N | 083 04 09 W |
| Delaware Hall | Building | 240 | Franklin | 39 58 13 N | 082 59 18 W |
| Delaware Industrial Park | Locale | 288 | Delaware | 40 17 06 N | 083 06 08 W |
| Delaware Island | Island | 175 | Lucas | 41 36 29 N | 083 35 15 W |
| Delaware Joint Vocational School | School | 287 | Delaware | 40 17 52 N | 083 01 44 W |
| Delaware Lake | Reservoir | 274 | Delaware | 40 21 31 N | 083 04 09 W |
| Delaware Meadows (subdivision) | Populated Place | 287 | Delaware | 40 17 48 N | 083 05 28 W |
| Delaware Municipal Airport | Airport | 287 | Delaware | 40 16 45 N | 083 06 21 W |
| Delaware Post Office | Post Office | 265 | Delaware | 40 17 49 N | 083 04 06 W |
| Delaware Post Office | Post Office | 265 | Delaware | 40 17 55 N | 083 04 05 W |
| Delaware Reservoir Landing Strip | Airport | 287 | Delaware | 40 22 27 N | 083 04 01 W |
| Delaware Reservoir Wildlife Area | Park | 282 | Delaware | 40 24 29 N | 083 02 41 W |
| Delaware Run | Stream | | Delaware | 40 17 53 N | 083 03 45 W |
| Delaware Seventh Day Adventist Church | Church | 272 | Delaware | 40 18 07 N | 083 04 02 W |
| Delaware Shopping Center | Locale | 272 | Delaware | 40 17 35 N | 083 04 01 W |
| Delaware Square Shopping Center | Locale | 275 | Delaware | 40 16 25 N | 083 04 13 W |
| Delbert Shetler Farm Cemetery | Cemetery | 353 | Holmes | 40 31 08 N | 081 44 51 W |
| Delco Plaza of Delhi Shopping Center | Locale | 262 | Hamilton | 39 05 40 N | 084 36 45 W |
| Delco Plaza Shopping Center | Locale | 245 | Clermont | 39 11 30 N | 084 15 27 W |
| Delco Plaza Shopping Center | Locale | 262 | Hamilton | 39 13 52 N | 084 35 16 W |
| Delco Plaza Shopping Center | Locale | 298 | Marion | 40 33 55 N | 083 07 24 W |