Milliken Mills HS offers a variety of clubs for students.
| Club |
|---|
| 1UP Club - Design Thinking and Urban Studies |
| Announcements Team |
| Band |
| Behind the Scenes / Film Club |
| Best Buddies |
| Blue Ribbon Club |
| Book Café |
| Milliken Business Organization (MBO)/DECA/SHSM |
| Cancer Society |
| CDN Computing Competition (CCC) |
| Chess |
| Chinese Student Association (CSA) |
| Computer Lab Assistants |
| Concert Choir |
| Cross Country |
| Dance Club |
| Debate Club |
| Drama Club |
| Dungeons & Dragons (DnD) |
| Equity & Inclusivity Committee |
| Feed The Mind |
| Fencing Club |
| Free the Children |
| French Club (Club de français) |
| Gay-Straight Alliance (GSA) / SPECTRUM |
| Green Inc. |
| Healthy Schools |
| Health Occupations Students of America |
| History Club |
| HOSA MMHS Chapter |
| Key Club |
| Knightrogen Science Club |
| Landscape Design Club/Competition |
| Library Club |
| Milliken Athletic Council (MAC) |
| Milliken Typewriter |
| Milliken Moments |
| Mindfulness Committee |
| Music Executive / Council |
| Open Studio (portfolio development) |
| Prom Committee |
| Reach for the Top (Trivia) |
| Red Cross |
| Robotics Team (First Robotics Canada program) |
| SLAM (Student Leaders at Milliken) |
| Stage Band |
| Student Activity Council (SAC) |
| TED Talk Club |
| Visual Arts (E-C) Discovery (Group) - art activities/workshops +contests, events/shows + cafe/lounge/share within public health recommendations |
| Youth of South Asia (YOSA) |
| Act 4 Impact |
| Anime Club |
| CAS Committee |
| Muslim Students' Association (MSA) |
| CU Club |
| Gomoku Club |
| Ignite Christian Fellowship (CF) |
| Math Society |
| Milliken Mills E-Sports Club |
| Model UN |
| Purple Project |
| Yearbook |
| Room to Read |
| Tamil Students' Association |
| Key Club |
| Forestry of Reading |
| The Weight Room Club |
| MMHS Tech Crew (Shadows) |
| STEMPower |
| SHSM |
| Computer Studies Club |
| VEX robotics club |