Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Odd Fellows Cemetery | Cemetery | 71 | Noxubee | 33 06 11 N | 088 33 01 W |
| Odell Barrier Dam | Dam | 150 | Neshoba | 32 58 42 N | 089 03 12 W |
| ODell Lake | Lake | 37 | Leflore | 33 25 37 N | 090 09 46 W |
| Odessa Briggs Pond Dam | Dam | 62 | Kemper | 32 50 24 N | 088 28 00 W |
| Odom Cemetery | Cemetery | 39 | Greene | 31 19 16 N | 088 31 52 W |
| Odom Cemetery | Cemetery | 99 | Jones | 31 31 01 N | 089 07 43 W |
| Odom Hill | Summit | 198 | Prentiss | 34 42 33 N | 088 22 07 W |
| Odom Lake Dam | Dam | 67 | Lowndes | 33 34 00 N | 088 18 36 W |
| Odom Mill (historical) | Locale | 108 | Jones | 31 31 35 N | 089 08 20 W |
| Odoms Cemetery | Cemetery | 78 | Forrest | 31 24 01 N | 089 10 58 W |
| Odoms Lake Dam | Dam | 83 | Jones | 31 42 31 N | 089 06 06 W |
| Odum Bayou | Stream | | Adams | 31 28 14 N | 091 12 38 W |
| Ofahoma | Populated Place | 104 | Leake | 32 42 26 N | 089 42 02 W |
| Officers Lake | Lake | 54 | Lowndes | 33 33 20 N | 088 28 17 W |
| Offutt Landing | Locale | 32 | Washington | 33 31 17 N | 091 11 40 W |
| Ogden Bayou Oil Field | Oilfield | 76 | Adams | 31 27 58 N | 091 22 55 W |
| Ogden Branch | Stream | | Adams | 31 27 15 N | 091 21 57 W |
| Ogden Cemetery | Cemetery | 91 | Yazoo | 32 37 52 N | 090 27 25 W |
| Ogden Cemetery | Cemetery | 104 | Yazoo | 32 38 03 N | 090 29 00 W |
| Ogden Church | Church | 90 | Yazoo | 32 37 50 N | 090 27 31 W |
| Oglesby Cemetery | Cemetery | 64 | Jefferson Davis | 31 25 45 N | 089 54 53 W |
| Oil City | Populated Place | 103 | Yazoo | 32 41 28 N | 090 26 02 W |
| Oil Well Spring | Spring | 158 | Tishomingo | 34 44 40 N | 088 09 17 W |
| Oka Hullo (historical) | Populated Place | 171 | Newton | 32 34 35 N | 089 03 45 W |
| Oka Kapassa (historical) | Populated Place | 172 | Newton | 32 31 46 N | 089 09 00 W |
| Okachickima Creek | Stream | | Yalobusha | 33 55 04 N | 089 41 53 W |
| Okahatta Canal | Canal | 114 | Newton | 32 26 31 N | 089 05 50 W |
| Okahatta Creek | Stream | | Newton | 32 19 22 N | 088 58 37 W |
| Okahay Baptist Church (historical) | Church | 120 | Covington | 31 46 04 N | 089 28 55 W |
| Okahola | Populated Place | 71 | Lamar | 31 12 26 N | 089 23 11 W |
| Okahola Baptist Church | Church | 76 | Lamar | 31 12 26 N | 089 23 03 W |
| Okahta Talaia (historical) | Populated Place | 159 | Newton | 32 27 46 N | 089 14 50 W |
| Okannatie Creek | Stream | | Union | 34 25 55 N | 089 07 52 W |
| Okatibbee (historical) | Locale | 86 | Lauderdale | 32 18 03 N | 088 44 43 W |
| Okatibbee Creek | Stream | | Clarke | 32 10 59 N | 088 49 19 W |
| Okatibbee Dam | Dam | 109 | Lauderdale | 32 28 31 N | 088 47 54 W |
| Okatibbee Lake | Reservoir | 105 | Lauderdale | 32 28 31 N | 088 47 48 W |
| Okatibbee State Wildlife Area | Park | 108 | Lauderdale | 32 34 00 N | 088 48 15 W |
| Okatibbee Water Park | Park | 121 | Lauderdale | 32 29 49 N | 088 46 50 W |
| Okatoma Creek | Stream | | Covington | 31 25 50 N | 089 24 12 W |
| Okatuppa Creek | Stream | | Clarke | 31 49 20 N | 088 10 48 W |
| Okeelala Creek | Stream | | Lee | 34 27 55 N | 088 36 11 W |
| Okey Branch | Stream | | Wayne | 31 29 47 N | 088 46 04 W |
| Okhissa Lake | Reservoir | 69 | Franklin | 31 25 51 N | 090 50 27 W |
| Oklahoma | Populated Place | 42 | Carroll | 33 20 01 N | 090 10 06 W |
| Oklahoma Church | Church | 104 | Carroll | 33 18 44 N | 090 05 26 W |
| Okolona | Populated Place | 102 | Chickasaw | 34 00 06 N | 088 45 19 W |
| Okolona Community Hospital | Hospital | 101 | Chickasaw | 34 00 10 N | 088 45 29 W |
| Okolona Elementary School | School | 104 | Chickasaw | 34 00 16 N | 088 45 17 W |
| Okolona Female College (historical) | School | 104 | Chickasaw | 34 00 16 N | 088 45 17 W |
| Okolona First Baptist Church | Church | 100 | Chickasaw | 34 00 14 N | 088 44 49 W |
| Okolona First United Methodist Church | Church | 102 | Chickasaw | 34 00 15 N | 088 45 01 W |
| Okolona High School | School | 92 | Chickasaw | 34 00 47 N | 088 45 10 W |
| Okolona Industrial School (historical) | School | 95 | Chickasaw | 34 01 07 N | 088 45 27 W |
| Okolona Male and Female Academy (historical) | School | 104 | Chickasaw | 34 00 16 N | 088 45 17 W |
| Okolona Presbyterian Church | Church | 101 | Chickasaw | 34 00 18 N | 088 45 09 W |
| Okolona Vocational Technical Center | School | 92 | Chickasaw | 34 00 47 N | 088 45 13 W |
| Okonatie Watershed UT-25-1 Dam | Dam | 92 | Union | 33 22 48 N | 088 53 48 W |
| Okonatie Watershed UT-25-2 Dam | Dam | 132 | Union | 34 22 48 N | 088 54 36 W |
| Oktibbeha (historical) | Populated Place | 118 | Kemper | 32 34 53 N | 088 48 25 W |
| Oktibbeha Airport | Airport | 75 | Oktibbeha | 33 29 30 N | 088 41 00 W |
| Oktibbeha County | Civil | 101 | Oktibbeha | 33 26 17 N | 088 49 48 W |
| Oktibbeha County Courthouse | Building | 117 | Oktibbeha | 33 27 50 N | 088 48 58 W |
| Oktibbeha County Heritage Museum | Building | 120 | Oktibbeha | 33 27 35 N | 088 48 26 W |
| Oktibbeha County Hospital | Hospital | 105 | Oktibbeha | 33 28 34 N | 088 49 13 W |
| Oktibbeha County Lake | Reservoir | 78 | Oktibbeha | 33 30 20 N | 088 56 00 W |
| Oktibbeha County Lake Dam | Dam | 76 | Oktibbeha | 33 30 24 N | 088 55 30 W |
| Oktibbeha Gardens (subdivision) | Populated Place | 107 | Oktibbeha | 33 28 07 N | 088 48 24 W |
| Oktibbeha Memorial Gardens | Cemetery | 113 | Oktibbeha | 33 25 36 N | 088 46 26 W |
| Oktoc | Populated Place | 85 | Oktibbeha | 33 19 56 N | 088 45 28 W |
| Oktoc Creek | Stream | | Noxubee | 33 15 27 N | 088 43 15 W |
| Okwakee Creek | Stream | | Greene | 31 07 12 N | 088 21 53 W |
| Olah Lookout Tower | Tower | 133 | Lamar | 31 17 32 N | 089 34 16 W |
| Old Aberdeen Road Church of Christ | Church | 80 | Clay | 33 37 36 N | 088 37 56 W |
| Old Advance Church | Church | 86 | Lamar | 31 21 35 N | 089 39 02 W |
| Old Algoma (historical) | Locale | 133 | Pontotoc | 34 10 35 N | 089 00 50 W |
| Old Americus | Populated Place | 8 | Jackson | 30 42 34 N | 088 35 45 W |
| Old Antioch Cemetery | Cemetery | 116 | Choctaw | 33 22 38 N | 089 27 01 W |
| Old Antioch Church | Church | 143 | Lafayette | 34 10 03 N | 089 17 16 W |
| Old Antioch Church (historical) | Church | 144 | Lauderdale | 32 15 28 N | 088 27 20 W |
| Old Arbor Mount Zion Church | Church | 146 | Leake | 32 37 56 N | 089 20 33 W |
| Old Atway Cemetery | Cemetery | 156 | Marshall | 34 51 46 N | 089 24 48 W |
| Old Auburn (historical) | Locale | 79 | Hinds | 32 11 09 N | 090 37 03 W |
| Old Augusta | Locale | 25 | Perry | 31 13 28 N | 089 02 59 W |
| Old Avera | Populated Place | 36 | Greene | 31 21 40 N | 088 34 01 W |
| Old Barth Community Church | Church | 40 | Pearl River | 30 40 19 N | 089 21 51 W |
| Old Bassfield (historical) | Populated Place | 131 | Jefferson Davis | 31 28 41 N | 089 45 30 W |
| Old Bassfield Cemetery | Cemetery | 140 | Jefferson Davis | 31 28 39 N | 089 45 40 W |
| Old Bay Springs Church | Church | 136 | Smith | 31 50 34 N | 089 21 38 W |
| Old Beech Grove Cemetery | Cemetery | 106 | Franklin | 31 31 51 N | 091 01 32 W |
| Old Bellefontaine (historical) | Locale | 139 | Webster | 33 39 14 N | 089 17 40 W |
| Old Bethel (historical) | Locale | 121 | Tishomingo | 34 28 00 N | 088 15 45 W |
| Old Bethel Cemetery | Cemetery | 128 | Lee | 34 29 33 N | 088 42 40 W |
| Old Bethel Cemetery | Cemetery | 127 | Tishomingo | 34 27 52 N | 088 15 49 W |
| Old Bethel Church | Church | 45 | Tallahatchie | 33 54 22 N | 090 15 38 W |
| Old Bethel Church | Church | 122 | Tishomingo | 34 27 54 N | 088 15 51 W |
| Old Bethel Primitive Baptist Church (historical) | Church | 145 | Tippah | 34 59 20 N | 088 49 26 W |
| Old Black Creek | Stream | | Holmes | 33 07 26 N | 090 16 14 W |
| Old Bordeaux Chute | Gut | 58 | Tunica | 34 45 40 N | 090 30 45 W |
| Old Bowie Cemetery | Cemetery | 159 | Attala | 33 09 57 N | 089 21 36 W |
| Old Brandon Cemetery | Cemetery | 147 | Rankin | 32 16 33 N | 089 59 33 W |
| Old Bridge (historical) | Bridge | 33 | Marion | 31 13 55 N | 089 51 12 W |
| Old Broom Cemetery | Cemetery | 116 | Marion | 31 24 45 N | 089 40 06 W |
| Old Bynum Cemetery | Cemetery | 110 | Panola | 34 12 55 N | 089 45 22 W |
| Old Canaan Church | Church | 136 | Neshoba | 32 49 36 N | 089 18 48 W |
| Old Capitol Museum | Building | 95 | Hinds | 32 17 57 N | 090 10 47 W |
| Old Carlson Church | Church | 156 | Webster | 33 38 56 N | 089 05 44 W |
| Old Caroline Cemetery | Cemetery | 98 | Tate | 34 34 45 N | 089 58 11 W |
| Old Caroline Church (historical) | Church | 172 | Tippah | 34 46 08 N | 088 53 38 W |
| Old Centreville (historical) | Locale | 110 | Amite | 31 05 36 N | 091 02 30 W |