Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Orrville | Populated Place | 173 | Limestone | 34 40 02 N | 086 58 37 W |
| Orrville Amish Mennonite Church | Church | 43 | Dallas | 32 18 06 N | 087 18 17 W |
| Orrville Baptist Church | Church | 58 | Dallas | 32 18 26 N | 087 14 37 W |
| Orrville Cemetery | Cemetery | 58 | Dallas | 32 17 46 N | 087 15 17 W |
| Ortiz Siding | Locale | 5 | Mobile | 30 49 33 N | 087 58 48 W |
| Orvin Lookout Tower | Tower | 79 | Mobile | 30 55 42 N | 088 07 31 W |
| Osage Bar | Bar | 10 | Choctaw | 31 51 36 N | 088 08 50 W |
| Osage Woodyard Landing | Populated Place | 11 | Clarke | 31 51 29 N | 088 08 54 W |
| Osaka | Populated Place | 32 | Escambia | 31 03 50 N | 087 13 26 W |
| Osaka Church | Church | 71 | Escambia | 31 04 17 N | 087 16 16 W |
| Osanippa | Populated Place | 202 | Chambers | 32 45 40 N | 085 09 04 W |
| Osanippa Church | Church | 195 | Chambers | 32 48 11 N | 085 15 08 W |
| Osanippa Creek | Stream | | Lee | 32 42 58 N | 085 07 21 W |
| Osborn | Populated Place | 143 | Perry | 32 41 01 N | 087 08 35 W |
| Osborn Branch | Stream | | Franklin | 34 24 56 N | 088 01 10 W |
| Osborn Cemetery | Cemetery | 180 | Franklin | 34 24 42 N | 088 00 38 W |
| Osborn Creek | Stream | | Perry | 32 42 08 N | 087 05 51 W |
| Osborn Creek | Stream | | Tallapoosa | 33 06 04 N | 085 50 26 W |
| Osborn Hill Cemetery | Cemetery | 269 | Colbert | 34 34 47 N | 087 40 02 W |
| Osborne Dam | Dam | 183 | Tallapoosa | 33 01 42 N | 085 56 00 W |
| Osborne Lake | Reservoir | 275 | Blount | 34 05 56 N | 086 31 51 W |
| Osborne Lake | Reservoir | 269 | Jefferson | 33 31 12 N | 086 41 06 W |
| Osborne Lake Dam | Dam | 269 | Jefferson | 33 31 12 N | 086 41 06 W |
| Osburn Cemetery | Cemetery | 142 | Perry | 32 40 37 N | 087 08 30 W |
| Oscar Cobb Dam | Dam | 74 | Hale | 32 29 18 N | 087 31 12 W |
| Oscar Cobb Lake | Reservoir | 74 | Hale | 32 29 18 N | 087 31 12 W |
| Oscar McGuffs Mine | Mine | 186 | Walker | 33 56 05 N | 087 01 40 W |
| Oscar Underwood Bridge | Bridge | 31 | Hale | 32 49 07 N | 087 48 56 W |
| Oscar W Adams Elementary School | School | 168 | Etowah | 34 00 04 N | 085 57 42 W |
| Osco | Populated Place | 133 | Barbour | 31 52 38 N | 085 14 09 W |
| Oseligee Creek | Stream | | Chambers | 32 53 20 N | 085 10 60 W |
| Osierfield | Locale | 91 | Conecuh | 31 27 01 N | 087 09 27 W |
| Osierfield School (historical) | School | 101 | Conecuh | 31 27 04 N | 087 09 50 W |
| Osment Pond | Reservoir | 214 | Lee | 32 41 54 N | 085 16 48 W |
| Osotchi (historical) | Locale | 84 | Russell | 32 16 36 N | 084 57 15 W |
| Ostette Dam | Dam | 99 | Macon | 32 16 19 N | 085 39 30 W |
| Oswall Creek | Stream | | Tuscaloosa | 33 22 04 N | 087 22 19 W |
| Oswalt (historical) | Locale | 317 | Cleburne | 33 32 13 N | 085 31 19 W |
| Oswalt Cemetery | Cemetery | 74 | Macon | 32 18 12 N | 085 56 00 W |
| Oswayo Number 3 Mine | Mine | 151 | Jefferson | 33 20 35 N | 087 07 45 W |
| Osways Mine | Mine | 160 | Jefferson | 33 20 50 N | 087 04 30 W |
| Oswichee | Populated Place | 103 | Russell | 32 16 47 N | 085 00 14 W |
| Oswichee Bridge | Bridge | 69 | Russell | 32 19 01 N | 085 00 53 W |
| Oswichee Cemetery | Cemetery | 103 | Russell | 32 16 41 N | 085 00 10 W |
| Oswichee Church | Church | 103 | Russell | 32 16 38 N | 085 00 10 W |
| Otho | Populated Place | 66 | Henry | 31 41 23 N | 085 07 47 W |
| Otho Branch | Stream | | Henry | 31 41 28 N | 085 07 18 W |
| Otipalin (historical) | Populated Place | 155 | Calhoun | 33 48 00 N | 086 03 40 W |
| Otis Barfield Dam | Dam | 88 | Dale | 31 28 31 N | 085 25 48 W |
| Oto Post Office (historical) | Post Office | 312 | Talladega | 33 18 12 N | 086 00 50 W |
| Otter Bayou | Gut | 1 | Washington | 31 17 42 N | 087 57 48 W |
| Otter Branch | Stream | | Lamar | 33 54 26 N | 088 13 36 W |
| Otter Branch | Stream | | Winston | 34 04 38 N | 087 25 12 W |
| Otter Creek | Stream | | Conecuh | 31 26 32 N | 087 01 17 W |
| Otter Pond | Reservoir | 69 | Covington | 31 06 54 N | 086 37 47 W |
| Ottery | Populated Place | 165 | Calhoun | 33 47 57 N | 086 02 14 W |
| Ottery Creek | Stream | | Calhoun | 33 48 56 N | 086 03 31 W |
| Ottis Burrow Dam | Dam | 238 | Cullman | 34 10 30 N | 086 52 30 W |
| Our Lady of Fatima Church | Church | 9 | Mobile | 30 43 57 N | 088 04 36 W |
| Our Lady of Fatima School | School | 69 | Montgomery | 32 22 02 N | 086 07 52 W |
| Our Lady of Lourdes Catholic Church | Church | 3 | Mobile | 30 35 37 N | 088 04 51 W |
| Our Lady of Lourdes School | School | 3 | Mobile | 30 35 40 N | 088 04 54 W |
| Our Lady of Mercy School | School | 60 | Montgomery | 32 19 16 N | 086 16 48 W |
| Our Lady of Mount Carmel Church | Church | 109 | Monroe | 31 18 57 N | 087 28 30 W |
| Our Lady of Sorrows Catholic Church (historical) | Church | 184 | Jefferson | 33 30 10 N | 086 48 31 W |
| Our Lady of Sorrows Church | Church | 218 | Jefferson | 33 28 34 N | 086 47 43 W |
| Our Lady of Sorrows Church | Church | 47 | Washington | 31 09 59 N | 088 06 47 W |
| Our Lady of Sorrows School | School | 214 | Jefferson | 33 28 33 N | 086 47 46 W |
| Our Lady of the Gulf Church | Church | 3 | Baldwin | 30 16 33 N | 087 40 56 W |
| Our Lady of the Lake Church | Church | 149 | St. Clair | 33 31 42 N | 086 17 35 W |
| Our Lady of the Shoals Catholic Church | Church | 157 | Colbert | 34 44 00 N | 087 41 16 W |
| Our Lady Queen of Mercy Church | Church | 61 | Montgomery | 32 19 16 N | 086 16 52 W |
| Our Lady Queen of the Universe Catholic Church | Church | 215 | Madison | 34 45 47 N | 086 37 36 W |
| Our Mother of Mercy Catholic Church | Church | 10 | Mobile | 30 44 03 N | 088 03 27 W |
| Our Redeemer Lutheran Church | Church | 87 | Montgomery | 32 22 53 N | 086 16 10 W |
| Our Savior Lutheran Church | Church | 6 | Mobile | 30 36 37 N | 088 09 41 W |
| Our Town | Populated Place | 201 | Tallapoosa | 32 49 41 N | 085 57 43 W |
| Ourtown School (historical) | School | 211 | Tallapoosa | 32 49 43 N | 085 57 47 W |
| Ousley Branch | Stream | | Pike | 31 52 35 N | 085 47 46 W |
| Ousley Store (historical) | Locale | 81 | Autauga | 32 34 32 N | 086 47 57 W |
| Outlaw Spring | Spring | 212 | Morgan | 34 27 23 N | 086 51 22 W |
| Outlaw Spring Branch | Stream | | Morgan | 34 24 50 N | 086 52 35 W |
| Outreach Church | Church | 187 | Shelby | 33 10 04 N | 086 46 24 W |
| Outreach Endtime Deliverance Church | Church | 114 | Pike | 31 51 28 N | 085 59 54 W |
| Oven Bluff | Cliff | 32 | Clarke | 31 21 43 N | 087 53 14 W |
| Oven Bluff Fishing Camp | Locale | 6 | Clarke | 31 21 23 N | 087 53 29 W |
| Oven Landing | Locale | 6 | Washington | 31 21 39 N | 087 53 30 W |
| Overbrook | Populated Place | 240 | Talladega | 33 07 18 N | 086 11 54 W |
| Overbrook Estates | Populated Place | 253 | Jefferson | 33 43 38 N | 086 38 30 W |
| Overlook | Populated Place | 464 | Jackson | 34 48 07 N | 085 40 48 W |
| Overlook (subdivision) | Populated Place | 94 | Autauga | 32 26 49 N | 086 25 48 W |
| Overlook Baptist Church | Church | 61 | Mobile | 30 43 10 N | 088 11 36 W |
| Overlook Christian Church | Church | 57 | Mobile | 30 43 10 N | 088 10 02 W |
| Overlook Church | Church | 468 | Jackson | 34 48 19 N | 085 40 08 W |
| Overlook Estates (subdivision) | Populated Place | 71 | Mobile | 30 43 21 N | 088 10 12 W |
| Overlook Presbyterian Church | Church | 64 | Mobile | 30 43 11 N | 088 09 55 W |
| Overlook Village Shopping Center | Locale | 65 | Mobile | 30 43 14 N | 088 09 53 W |
| Overstreet Cemetery | Cemetery | 65 | Clarke | 31 40 16 N | 088 02 06 W |
| Overton | Populated Place | 186 | Jefferson | 33 30 16 N | 086 41 23 W |
| Overton Bridge | Bridge | 207 | Randolph | 33 18 29 N | 085 34 24 W |
| Overton Cemetery | Cemetery | 204 | Franklin | 34 23 09 N | 087 57 33 W |
| Overton Cemetery | Cemetery | 310 | Shelby | 33 24 34 N | 086 34 19 W |
| Overton Dam | Dam | 232 | Calhoun | 33 55 48 N | 085 45 30 W |
| Overton Elementary School | School | 180 | Jefferson | 33 30 07 N | 086 41 38 W |
| Overton Gap | Gap | 332 | Shelby | 33 25 20 N | 086 38 34 W |
| Overton Heights (subdivision) | Populated Place | 73 | Elmore | 32 30 32 N | 086 20 47 W |
| Overton Lake | Reservoir | 233 | Calhoun | 33 55 50 N | 085 45 31 W |
| Overton Lake | Reservoir | 176 | Jefferson | 33 30 05 N | 086 41 30 W |
| Overton Manor | Populated Place | 214 | Jefferson | 33 27 54 N | 086 43 28 W |
| Overton Mine | Mine | 179 | Jefferson | 33 29 20 N | 086 40 45 W |