SNA Marianapolis International offers a wide variety of clubs and activities. These range from academic in nature, to performing arts, games, athletic, science, history, cultural and more. Students, with the supervision of a faculty member, may establish a new club if the current offerings do not include their area of interest. Extracurricular activities are a pillar of the SNA Marianapolis educational experience.


Clubs and organizations at Marianapolis Prep (USA) that may be expanded to SNA Marianapolis International School include:
- A Capella Club
- Ambassador Club
- American Sign Language
- Club Coding
- Club Comic/Illustration Club
- Community Service Club
- Knitting/Crocheting Club
- Marianapolis Engineering & Robotics Club
- Marianapolis Family Network
- Math & Science Lab
- NOSB Team
- Politics & Pastry Club
- Retro Video Game Club
- Schola Choir
- Business & Entrepreneurship Club
- Calliope
- Coding Club
- Disaster Relief Club
- Film Club
- The Green Knights
- Calliope
- Math Team
- Model United Nations
- Mountain Biking Club
- National Honor Society
- Sociedad Honoraria Hispanica
- Tech Innovation Club
- Writing Center