Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Oaklands Mansion | Building | 189 | Rutherford | 35 51 22 N | 086 23 07 W |
| Oaklands Park | Park | 187 | Rutherford | 35 51 18 N | 086 23 02 W |
| Oaklawn | Populated Place | 222 | Cheatham | 36 24 37 N | 087 05 17 W |
| Oaklawn | Populated Place | 99 | Shelby | 35 17 03 N | 090 02 24 W |
| Oaklawn (subdivision) | Populated Place | 332 | Putnam | 36 10 17 N | 085 28 60 W |
| Oaklawn Addition (subdivision) | Populated Place | 302 | Blount | 35 44 45 N | 083 56 30 W |
| Oaklawn Cemetery | Cemetery | 579 | Cumberland | 35 56 56 N | 085 07 06 W |
| Oaklawn Church | Church | 222 | Cheatham | 36 24 40 N | 087 05 16 W |
| Oaklawn Church | Church | 299 | Franklin | 35 10 34 N | 086 05 33 W |
| Oaklawn Church | Church | 84 | Shelby | 35 16 58 N | 090 02 14 W |
| Oaklawn Memorial Cemetery | Cemetery | 299 | White | 35 56 40 N | 085 30 41 W |
| Oakleaf Estates (subdivision) | Populated Place | 215 | Williamson | 35 52 48 N | 086 52 08 W |
| Oakleigh Estates (subdivision) | Populated Place | 511 | Sullivan | 36 34 25 N | 082 15 23 W |
| Oakley | Populated Place | 319 | Overton | 36 30 28 N | 085 18 38 W |
| Oakley Branch | Stream | | DeKalb | 36 05 38 N | 085 56 55 W |
| Oakley Branch | Stream | | Dickson | 36 11 32 N | 087 10 09 W |
| Oakley Branch | Stream | | Wilson | 36 01 50 N | 086 06 18 W |
| Oakley Cemetery | Cemetery | 227 | Maury | 35 50 27 N | 087 12 09 W |
| Oakley Cemetery | Cemetery | 204 | Maury | 35 47 05 N | 087 10 44 W |
| Oakley Cemetery | Cemetery | 430 | Overton | 36 16 37 N | 085 16 45 W |
| Oakley Hollow | Valley | | DeKalb | 36 05 40 N | 085 56 56 W |
| Oakley Mill Branch | Stream | | Maury | 35 46 40 N | 087 10 45 W |
| Oakley Mill Creek | Stream | | Maury | 35 47 32 N | 087 10 49 W |
| Oaklyn | Populated Place | 553 | Cumberland | 35 57 40 N | 085 04 05 W |
| Oakman (historical) | Populated Place | 327 | Grainger | 36 20 56 N | 083 33 38 W |
| Oakman Tunnel | Tunnel | 337 | Grainger | 36 21 46 N | 083 32 60 W |
| Oakmont (subdivision) | Populated Place | 180 | Wilson | 36 12 27 N | 086 30 50 W |
| Oakmont Cemetery | Cemetery | 203 | Hickman | 35 46 44 N | 087 30 03 W |
| Oakmont Elementary School | School | 249 | Dickson | 36 04 28 N | 087 22 49 W |
| Oakmont Elementary School | School | 279 | Sumner | 36 30 33 N | 086 34 23 W |
| Oakridge | Populated Place | 221 | Montgomery | 36 23 39 N | 087 27 30 W |
| Oakridge School (historical) | School | 136 | Obion | 36 17 31 N | 089 17 10 W |
| Oaks Cemetery | Cemetery | 1012 | Carter | 36 10 41 N | 082 00 17 W |
| Oaks Cemetery | Cemetery | 364 | Union | 36 19 10 N | 083 55 28 W |
| Oaks Chapel (historical) | Church | 330 | Union | 36 18 24 N | 083 54 53 W |
| Oaks Chapel Cemetery | Cemetery | 329 | Union | 36 18 25 N | 083 54 56 W |
| Oaks School | School | 336 | Warren | 35 46 22 N | 085 52 10 W |
| Oakvale (subdivision) | Populated Place | 147 | Sumner | 36 18 45 N | 086 36 56 W |
| Oakview | Populated Place | 100 | Haywood | 35 38 50 N | 089 19 00 W |
| Oakview | Populated Place | 570 | Sullivan | 36 33 26 N | 082 20 25 W |
| Oakview (historical) | Populated Place | 115 | Decatur | 35 47 24 N | 088 00 10 W |
| Oakview Church | Church | 97 | Haywood | 35 38 53 N | 089 19 00 W |
| Oakview Cumberland Presbyterian Church (historical) | Church | 343 | Blount | 35 43 08 N | 084 00 15 W |
| Oakview Memorial Park | Park | 114 | Crockett | 35 45 08 N | 089 06 40 W |
| Oakview Recreation Park | Park | 109 | Dyer | 36 06 55 N | 089 16 45 W |
| Oakview School (historical) | School | 195 | Houston | 36 16 12 N | 087 46 26 W |
| Oakview School (historical) | School | 129 | Perry | 35 48 45 N | 087 56 40 W |
| Oakview School (historical) | School | 570 | Sullivan | 36 33 28 N | 082 20 28 W |
| Oakville | Populated Place | 82 | Shelby | 35 03 54 N | 089 56 27 W |
| Oakville Cemetery | Cemetery | 83 | Shelby | 35 04 07 N | 089 56 24 W |
| Oakville Memorial Hospital | Hospital | 88 | Shelby | 35 03 26 N | 089 56 16 W |
| Oakville Missionary Baptist Church | Church | 92 | Shelby | 35 03 44 N | 089 54 39 W |
| Oakville School | School | 82 | Shelby | 35 04 04 N | 089 56 33 W |
| Oakwood | Populated Place | 272 | Bradley | 35 13 17 N | 084 48 41 W |
| Oakwood | Populated Place | 191 | Montgomery | 36 32 09 N | 087 34 46 W |
| Oakwood | Populated Place | 191 | Rutherford | 35 50 29 N | 086 30 15 W |
| Oakwood | Populated Place | 201 | Rutherford | 35 45 38 N | 086 24 25 W |
| Oakwood (subdivision) | Populated Place | 401 | Hamblen | 36 11 46 N | 083 21 37 W |
| Oakwood Acres Lake | Reservoir | 204 | Lincoln | 35 07 28 N | 086 32 03 W |
| Oakwood Cemetery | Cemetery | 318 | Coffee | 35 22 10 N | 086 13 09 W |
| Oakwood Cemetery | Cemetery | 107 | Haywood | 35 35 26 N | 089 16 05 W |
| Oakwood Church | Church | 250 | Cheatham | 36 19 34 N | 086 55 35 W |
| Oakwood Church | Church | 121 | Gibson | 35 57 24 N | 088 46 41 W |
| Oakwood Church | Church | 226 | Hamilton | 35 04 36 N | 085 12 13 W |
| Oakwood Church | Church | 196 | Robertson | 36 29 32 N | 087 03 56 W |
| Oakwood Elementary School | School | 311 | Knox | 35 59 19 N | 083 55 59 W |
| Oakwood Estates (subdivision) | Populated Place | 206 | Williamson | 35 52 55 N | 086 51 38 W |
| Oakwood School | School | 121 | Gibson | 35 57 24 N | 088 46 40 W |
| Oakwood School (historical) | School | 167 | Davidson | 36 08 35 N | 086 34 48 W |
| Oakwood School (historical) | School | 197 | Montgomery | 36 31 58 N | 087 34 12 W |
| Oakwood Terrace (subdivision) | Populated Place | 167 | Davidson | 36 04 24 N | 086 40 27 W |
| Oakwood United Methodist Church | Church | 294 | Knox | 35 59 35 N | 083 56 15 W |
| Oars Ferry (historical) | Crossing | 277 | Grainger | 36 09 46 N | 083 31 43 W |
| Oates Cemetery | Cemetery | 195 | Marion | 35 04 46 N | 085 30 53 W |
| Oates Island | Island | 195 | Marion | 35 04 00 N | 085 31 48 W |
| Obar Branch | Stream | | Hamilton | 35 01 20 N | 085 24 29 W |
| Obar Spring | Spring | 230 | Hamilton | 35 01 27 N | 085 24 23 W |
| Obe Lee Hollow | Valley | | Overton | 36 15 32 N | 085 13 37 W |
| Obed Junction | Populated Place | 331 | Morgan | 36 04 46 N | 084 45 50 W |
| Obed River | Stream | | Morgan | 36 04 31 N | 084 38 59 W |
| Obed River Estates | Populated Place | 567 | Cumberland | 35 56 00 N | 085 05 40 W |
| Obed Wild and Scenic River | Park | 331 | Morgan | 36 04 45 N | 084 45 55 W |
| Oberle-Watkins Park | Park | 89 | Shelby | 35 12 07 N | 090 00 23 W |
| Obes Branch | Stream | | Sevier | 35 50 56 N | 083 23 37 W |
| Obey City | Populated Place | 502 | Overton | 36 10 25 N | 085 10 05 W |
| Obey River | Stream | | Clay | 36 33 18 N | 085 30 44 W |
| Obey River Recreation Area | Park | 202 | Pickett | 36 31 51 N | 085 10 10 W |
| Obion | Populated Place | 87 | Obion | 36 15 32 N | 089 11 30 W |
| Obion Chapel | Church | 160 | Carroll | 35 55 12 N | 088 34 04 W |
| Obion Chapel | Church | 141 | Obion | 36 19 56 N | 089 15 26 W |
| Obion Chapel | Church | 120 | Weakley | 36 22 37 N | 088 52 12 W |
| Obion Chapel Cemetery | Cemetery | 142 | Obion | 36 19 55 N | 089 15 28 W |
| Obion Chapel Cemetery | Cemetery | 123 | Weakley | 36 22 35 N | 088 52 13 W |
| Obion Chapel School (historical) | School | 140 | Obion | 36 19 56 N | 089 15 25 W |
| Obion County | Civil | 122 | Obion | 36 23 00 N | 089 09 00 W |
| Obion County Central School | School | 114 | Obion | 36 20 37 N | 089 09 23 W |
| Obion County Courthouse | Building | 104 | Obion | 36 25 23 N | 089 03 33 W |
| Obion County Home (historical) | Building | 115 | Obion | 36 25 01 N | 089 07 48 W |
| Obion Lake (historical) | Lake | 80 | Dyer | 36 11 25 N | 089 20 35 W |
| Obion River | Stream | | Lauderdale | 35 54 27 N | 089 38 20 W |
| Obion River Drainage Canal | Canal | 84 | Obion | 36 13 37 N | 089 09 33 W |
| Obion School | School | 88 | Obion | 36 15 38 N | 089 11 29 W |
| Obion Square Shopping Center | Locale | 96 | Obion | 36 24 47 N | 089 03 35 W |
| Obion-Tamm Revetment | Levee | 70 | Lauderdale | 35 52 22 N | 089 40 05 W |
| Observation Knob | Summit | 615 | Sullivan | 36 34 28 N | 082 02 20 W |
| Observation Park | Park | 542 | Sullivan | 36 34 38 N | 082 02 20 W |
| Observation Point | Summit | 416 | Anderson | 36 12 32 N | 084 04 13 W |
| Ocana | Populated Place | 147 | Sumner | 36 22 57 N | 086 33 30 W |
| Ocoee | Populated Place | 243 | Polk | 35 07 20 N | 084 43 08 W |
| Ocoee Dam Number One | Dam | 255 | Polk | 35 05 43 N | 084 38 53 W |