Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| United Community Pentecostal Church | Church | 98 | Hinds | 32 18 25 N | 090 14 25 W |
| United Pentecostal Church of Gautier | Church | 4 | Jackson | 30 24 19 N | 088 39 18 W |
| United State Forest Service Ashe Nursery | Locale | 89 | Forrest | 31 01 32 N | 089 09 50 W |
| United State Merchant Marine School | School | 2 | Harrison | 30 18 28 N | 089 17 26 W |
| United States Forest Service Lake Dam | Dam | 136 | Benton | 34 38 00 N | 089 11 00 W |
| United States Forest Service Lake Dam | Dam | 152 | Benton | 34 38 48 N | 089 09 00 W |
| United States Waterways Experiment Station | Locale | 58 | Warren | 32 17 59 N | 090 51 51 W |
| Unity | Populated Place | 115 | Lee | 34 23 24 N | 088 34 08 W |
| Unity (historical) | Populated Place | 127 | Attala | 33 10 15 N | 089 43 50 W |
| Unity Baptist Church | Church | 72 | Forrest | 31 18 10 N | 089 19 47 W |
| Unity Baptist Church | Church | 3 | Jackson | 30 21 41 N | 088 31 32 W |
| Unity Baptist Church | Church | 41 | Marion | 31 15 45 N | 089 50 52 W |
| Unity Baptist Church | Church | 37 | Washington | 33 23 50 N | 091 01 28 W |
| Unity Cemetery | Cemetery | 95 | Amite | 31 03 41 N | 090 53 32 W |
| Unity Cemetery | Cemetery | 125 | Attala | 33 10 05 N | 089 43 51 W |
| Unity Cemetery | Cemetery | 107 | Lee | 34 11 24 N | 088 35 50 W |
| Unity Cemetery | Cemetery | 129 | Lee | 34 23 33 N | 088 34 10 W |
| Unity Cemetery | Cemetery | 100 | Lowndes | 33 40 23 N | 088 19 40 W |
| Unity Cemetery | Cemetery | 112 | Pike | 31 07 50 N | 090 32 26 W |
| Unity Chapel | Church | 59 | Jones | 31 28 38 N | 089 09 04 W |
| Unity Church | Church | 86 | Amite | 31 03 58 N | 090 53 17 W |
| Unity Church | Church | 125 | Attala | 33 10 07 N | 089 43 51 W |
| Unity Church | Church | 86 | Jefferson | 31 47 57 N | 090 52 24 W |
| Unity Church | Church | 138 | Lawrence | 31 23 14 N | 090 08 28 W |
| Unity Church | Church | 108 | Lee | 34 11 25 N | 088 35 47 W |
| Unity Church | Church | 129 | Lee | 34 23 36 N | 088 34 07 W |
| Unity Church | Church | 106 | Montgomery | 33 40 09 N | 089 35 07 W |
| Unity Church | Church | 113 | Pike | 31 07 51 N | 090 32 28 W |
| Unity Church | Church | 189 | Tippah | 34 48 26 N | 088 58 01 W |
| Unity Church | Church | 38 | Washington | 33 20 26 N | 091 05 02 W |
| Unity Church | Church | 156 | Webster | 33 39 00 N | 089 11 12 W |
| Unity Church (historical) | Church | 98 | Lee | 34 12 23 N | 088 37 40 W |
| Unity Church of Positive Thinking | Church | 95 | Hinds | 32 22 44 N | 090 09 55 W |
| Unity School | School | 122 | Lafayette | 34 16 34 N | 089 18 59 W |
| Unity School (historical) | School | 168 | Attala | 33 14 46 N | 089 23 35 W |
| Unity Springs Church | Church | 183 | Kemper | 32 43 53 N | 088 51 19 W |
| Universal School | School | 114 | Pike | 31 13 14 N | 090 27 56 W |
| University (subdivision) | Populated Place | 150 | Lafayette | 34 21 57 N | 089 31 31 W |
| University Baptist Church | Church | 62 | Forrest | 31 19 16 N | 089 20 13 W |
| University Christian School | School | 111 | Rankin | 32 20 53 N | 090 02 55 W |
| University Church | Church | 129 | Lafayette | 34 20 09 N | 089 31 07 W |
| University Estates (subdivision) | Populated Place | 101 | Oktibbeha | 33 27 30 N | 088 46 37 W |
| University Estates Community Park | Park | 93 | Oktibbeha | 33 27 35 N | 088 46 41 W |
| University Heights (subdivision) | Populated Place | 111 | Oktibbeha | 33 27 02 N | 088 48 25 W |
| University Lookout Tower | Tower | 66 | Stone | 30 43 59 N | 088 54 44 W |
| University Mall Shopping Center | Locale | 71 | Forrest | 31 19 24 N | 089 20 45 W |
| University Mall Shopping Center | Locale | 55 | Lowndes | 33 31 27 N | 088 26 18 W |
| University of Mississippi | School | 152 | Lafayette | 34 22 00 N | 089 32 07 W |
| University of Mississippi Medical Center | Hospital | 107 | Hinds | 32 19 47 N | 090 10 26 W |
| University of Mississippi Medical Center Airport | Airport | 107 | Hinds | 32 20 01 N | 090 10 00 W |
| University of Mississippi Seismic Station | Locale | 96 | Lafayette | 34 30 41 N | 089 24 30 W |
| University of Southern Mississipp-Gulf Park Campus | School | 6 | Harrison | 30 21 09 N | 089 08 11 W |
| University of Southern Mississippi | School | 69 | Forrest | 31 19 36 N | 089 19 56 W |
| University of Southern Mississippi Golf Course Lake Dam | Dam | 52 | Forrest | 31 23 13 N | 089 21 54 W |
| University-Oxford Airport | Airport | 128 | Lafayette | 34 23 03 N | 089 32 06 W |
| Updike | Populated Place | 30 | Sharkey | 33 03 34 N | 090 46 07 W |
| Upper American Legion Lake Dam | Dam | 104 | Lee | 34 17 12 N | 088 43 30 W |
| Upper Bogue | Stream | | Bolivar | 33 59 31 N | 090 52 11 W |
| Upper Cameron Lake | Lake | 28 | Pearl River | 30 56 42 N | 089 44 15 W |
| Upper Carter Lake | Lake | 5 | Jackson | 30 43 06 N | 088 39 33 W |
| Upper Dead River | Stream | | Forrest | 31 13 22 N | 089 08 52 W |
| Upper Field Hollow | Valley | | Tishomingo | 34 50 59 N | 088 06 09 W |
| Upper Flat Branch | Stream | | Greene | 31 17 09 N | 088 47 08 W |
| Upper Glendora Cut-Off | Bend | 41 | Tallahatchie | 33 50 29 N | 090 16 54 W |
| Upper Grand Gulf Landing | Locale | 18 | Claiborne | 32 02 16 N | 091 03 48 W |
| Upper Hard Times Landing | Locale | 26 | Yazoo | 32 40 33 N | 090 37 10 W |
| Upper Jerry Lake | Lake | 0 | Jackson | 30 32 46 N | 088 34 57 W |
| Upper Lake | Reservoir | 102 | Carroll | 33 22 52 N | 089 53 09 W |
| Upper Leaf River Number 9 Dam | Dam | 114 | Smith | 32 02 01 N | 089 30 00 W |
| Upper Little Creek | Stream | | Marion | 31 09 44 N | 089 48 52 W |
| Upper Pechahallee Lake | Reservoir | 130 | Benton | 34 39 13 N | 089 12 45 W |
| Upper Quiver River | Stream | | Tallahatchie | 33 58 46 N | 090 24 33 W |
| Upper Ramsey Lake | Lake | 5 | Jackson | 30 42 13 N | 088 38 42 W |
| Upper Rines Lake | Lake | 9 | George | 30 49 04 N | 088 44 03 W |
| Upper Running Water Church | Church | 76 | Noxubee | 33 01 11 N | 088 39 34 W |
| Upper Shady Grove Church | Church | 90 | Holmes | 33 09 14 N | 089 58 51 W |
| Upper Tippah Watershed LT-6-1 Dam | Dam | 174 | Benton | 34 50 42 N | 089 02 12 W |
| Upper Tippah Watershed LT-6-17 Dam | Dam | 134 | Tippah | 34 47 00 N | 089 02 54 W |
| Upper Tippah Watershed LT-6-2 Dam | Dam | 175 | Benton | 34 49 18 N | 089 03 54 W |
| Upper Tippah Watershed LT-6-4 Dam | Dam | 179 | Benton | 34 49 18 N | 089 02 12 W |
| Upper Toposhaw Structure Y-27-1 Dam | Dam | 118 | Chickasaw | 33 45 18 N | 089 05 36 W |
| Upper Tuscaloosa Oil Pool | Oilfield | 100 | Jasper | 31 52 51 N | 088 59 10 W |
| Upper Yalobusha Public Use Area | Park | 69 | Calhoun | 33 48 57 N | 089 29 30 W |
| Upper Yockanookany Number 1 Dam | Dam | 176 | Choctaw | 33 19 30 N | 089 10 00 W |
| Upper Yockanookany Number 2 Dam | Dam | 170 | Choctaw | 33 19 00 N | 089 09 42 W |
| Upper Yockanookany Number 3 Dam | Dam | 172 | Choctaw | 33 18 30 N | 089 09 06 W |
| Upper Yockanookany Number 4 Dam | Dam | 166 | Choctaw | 33 18 00 N | 089 09 54 W |
| Upper Yocona River Watershed Y-14-8 Dam | Dam | 113 | Lafayette | 34 17 00 N | 089 16 24 W |
| Upper Yocona River Watershed Y-14-8 Dam | Dam | 129 | Pontotoc | 34 17 18 N | 089 15 12 W |
| Upper Yocona River Watershed Y-14-9 Dam | Dam | 142 | Pontotoc | 34 15 24 N | 089 13 06 W |
| Upton | Populated Place | 131 | Simpson | 31 59 25 N | 089 42 14 W |
| Urbo (historical) | Populated Place | 102 | Newton | 32 19 11 N | 089 05 10 W |
| Uriel (historical) | Locale | 75 | Wayne | 31 33 03 N | 088 37 08 W |
| Ursino (historical) | Locale | 24 | Warren | 32 08 59 N | 091 04 03 W |
| Ursino Bar | Bar | 13 | Warren | 32 08 05 N | 091 04 10 W |
| Ursino Landing (historical) | Locale | 20 | Warren | 32 08 30 N | 091 04 08 W |
| Usher Lake | Reservoir | 101 | Lauderdale | 32 21 07 N | 088 47 08 W |
| Usher Valley Church | Church | 119 | Pontotoc | 34 10 36 N | 089 02 54 W |
| Uspoha Creek | Stream | | Simpson | 31 47 60 N | 089 40 32 W |
| Usrytown | Populated Place | 137 | Scott | 32 23 12 N | 089 22 52 W |
| USS Cairo Museum | Building | 78 | Warren | 32 22 32 N | 090 51 58 W |
| Ustane | Populated Place | 121 | Amite | 31 17 13 N | 090 49 53 W |
| Utica | Populated Place | 90 | Hinds | 32 06 35 N | 090 37 24 W |
| Utica High School | School | 85 | Hinds | 32 06 30 N | 090 37 39 W |
| Utica Junior College | School | 65 | Copiah | 32 02 48 N | 090 37 24 W |
| Utica School | School | 56 | Hinds | 32 03 18 N | 090 37 10 W |
| Utkolb Pond Dam | Dam | 88 | DeSoto | 34 50 18 N | 089 44 36 W |
| Utley Branch | Stream | | Tishomingo | 34 58 19 N | 088 20 59 W |
| Utley Lake Dam | Dam | 115 | Union | 34 32 18 N | 088 56 06 W |
| V W Landen Pond Dam | Dam | 84 | Yazoo | 32 43 00 N | 090 23 48 W |