Below are the 21 member districts that make up TMCSEA.
- Washington District #50
- Central Grade School District #51
- Washington Elementary District #52
- Creve Coeur District #76
- Robein School District #85
- East Peoria Elementary District #86
- Rankin School District #98
- North Pekin/Marquette Heights District #102
- Pekin Public Schools District #108
- South Pekin Grade School District #137
- Pekin High School District #303
- Washington High School District #308
- East Peoria High School District #309
- Spring Lake District #606
- Deer Creek-Mackinaw District #701
- Tremont Community District #702
- Delavan Community District #703
- Morton Unit District #709
- Havana District #126
- Illini Central District #189
- Midwest Central District #191