| Name |
County |
| Southwest Middle School |
Barry County |
| Southwest Middle School |
St. Louis County |
| Sparta Middle School |
Christian County |
| Spokane Middle School |
Christian County |
| Spring Garden Middle School |
Buchanan County |
| Steelville Middle School |
Crawford County |
| Steger Sixth Grade Center |
St. Louis County |
| Stockton Middle School |
Cedar County |
| Strafford Middle School |
Greene County |
| Sullivan Middle School |
Franklin County |
| Summit Lakes Middle School |
Jackson County |
| T S Hill Middle School |
Stoddard County |
| Thomas Jefferson Middle School |
Cole County |
| Trenton Middle School |
Grundy County |
| Troy Middle School |
Lincoln County |
| Troy South Middle School |
Lincoln County |
| Truman Middle School |
Buchanan County |
| Union Middle School |
Franklin County |
| University Academy Middle School |
Jackson County |
| Valley Park Middle School |
St. Louis County |
| Versailles Middle School |
Morgan County |
| W N Clark Middle School |
Howard County |
| Wallace Middle School |
Pemiscot County |
| Warrensburg Middle School |
Johnson County |
| Washington Middle School |
Franklin County |
| Washington Middle School |
St. Louis County |
| Waynesville Middle School |
Pulaski County |
| Webb City Junior High School |
Jasper County |
| Webb City Middle School |
Jasper County |
| Webster Middle School |
St. Louis city |
| Wentzville Middle School |
St. Charles County |
| Wentzville South Middle School |
St. Charles County |
| West County Middle School |
St. Francois County |
| West Middle School |
Boone County |
| West Plains Middle School |
Howell County |
| Westran Middle School |
Randolph County |
| Westview Middle School |
St. Louis County |
| Wheeler Middle School |
Callaway County |
| Wildwood Middle School |
St. Louis County |
| Willard Middle School |
Greene County |
| William Matthew Middle School |
Adair County |
| Willow Springs Middle School |
Howell County |
| Wilson's Creek 5-6 Intermediate School |
Greene County |
| Windsor Middle School |
Jefferson County |
| Winfield Intermediate School |
Lincoln County |
| Woodland Middle School |
Bollinger County |
| Wright City Middle School |
Warren County |
| Wydown Middle School |
St. Louis County |
| Yeatman - Liddell Middle School |
St. Louis city |
