Afterschool Activities at Cynthia Heights includes:
- Student Council (Grades 3-5)
- Choir (Grades 4 & 5)
- Hoosier Spell Bowl (Grades 4 & 5)
- Safety Patrol (Grade 5)
- Boys' and Girls' Varsity Basketball (Grades 4 & 5)
- Wrestling Program (Grades K-5)
- Stem Clubs
- Lego Robotics Club
- Engineering Club
- Seaperch
- Science Fair (Grades K-5)
- Celebration of Reading (Grades K-5)
- Cheerleading and Pom Pon (Grade 5)
- Chess Club (Grades K-5)
- Cynthia Heights Girls Vollyball Team