| Oaklimeter Creek Watershed Structure Lt-8-05 Dam Benton County | 26 | 1959 | Low | Not Rated |
| Oaklimeter Creek Watershed Structure Lt-8-04 Dam Benton County | 25 | 1959 | Low | Not Rated |
| Oakley Lake Dam Oktibbeha County | 10 | — | Low | Not Rated |
| Oak Lake Dam Rankin County | 16 | 1950 | High | Satisfactory |
| Oak Hills Lake Dam Lincoln County | 17 | — | Low | Not Rated |
| Oak Hill Lake Dam Covington County | 18 | 2009 | Undetermined | Not Rated |
| Oakes Lake Dam Attala County | 12 | — | Low | Not Rated |
| Nutt Lake Dam Madison County | 28 | 2008 | Low | Not Rated |
| Nunnery Lake Dam Pike County | 14 | — | Low | Not Rated |
| Noxubee Game Farm Lake Dam Noxubee County | 12 | — | Low | Not Rated |
| Nortrust Farm Management Lake Number 2 Dam Hinds County | 17 | — | Low | Not Rated |
| Nortrust Farm Management Lake Dam Hinds County | 18 | — | Low | Not Rated |
| North Tippah Watershed Structure Lt-6a-14 Dam Tippah County | 26 | 1967 | Low | Not Rated |
| North Tippah Watershed Structure Lt-6a-02 Dam Tippah County | 28 | 1962 | Low | Not Rated |
| North Tippah Watershed Structure Lt-6a-01 Dam Tippah County | 24 | 1962 | Low | Not Rated |
| North Tillatoba Hunter Creek WS Str Y-17c-6b Dam Tallahatchie County | 38 | 1986 | High | Poor |
| North Tillatoba Hunter Creek WS Str Y-17c-1 Dam Tallahatchie County | 35 | 1985 | Low | Not Rated |
| North Tillatoba Hunter Creek Drainage District Structure Y-17c-9 Dam Tallahatchie County | 37 | 1987 | Low | Not Rated |
| North Tillatoba Hunter Creek Drainage District Structure Y-17c-5 Dam Tallahatchie County | 44 | 1986 | Low | Not Rated |
| North Tillatoba Hunter Creek Drainage District Structure Y-17c-3 Dam Tallahatchie County | 30 | 1985 | Low | Not Rated |
| North Tillatoba Hunter Creek Drainage District Structure Y-17c-2 Dam Tallahatchie County | 34 | 1985 | Low | Not Rated |
| North Tillatoba Hunter Creek Drainage District Structure Y-17c-2b Dam Tallahatchie County | 43 | 1993 | Low | Not Rated |
| North Tillatoba Hunter Creek Drainage District Structure Y-17c-21 Dam Tallahatchie County | 19 | 1988 | Low | Not Rated |
| North Tillatoba Hunter Creek Drainage District Structure Y-17c-20 Dam Tallahatchie County | 30 | 1987 | Low | Not Rated |
| North Tillatoba Hunter Creek Drainage District Structure Y-17c-18 Dam Tallahatchie County | 30 | 1988 | Low | Not Rated |