- African Student Community
- Academic Sailing Club Clausthal e.V. (ASC)
- Bigband at the TU Clausthal e.V.
- Chinese Community at the TU Clausthal
- Clausthal students from Cameroon
- Clausthaler Tanzbären e.V.
- Consulting Team e.V.
- Catholic and Protestant University Community Clausthal
- Friends of the Student Council for Geosciences, Natural Resources and Economics e. V.
- Association for the Promotion of Polymer Materials and Plastics Technology in Clausthal e.V.
- Green Voltage Racing e.V.
- Heim 1 e.V.
- University group GustaV
- Islamic student community at the TU Clausthal
- JCF Harz
- Chamber choir at the TU Clausthal
- Kellerclub im Studentenzentrum e.V.
- Clausthal Liberal University Group
- Ring of Christian-Democratic Students at the TU Clausthal
- Science on the Rocks e.V.
- Clausthal University of Technology Symphony Orchestra
- Clausthal-Zellerfeld Model Club v.1967 e.V.
- Rock, Pop & Jazz Choir of the TU Clausthal
- SLIC - The queer community in the Oberharz region
- Clausthal University of Technology Hackerspace (TUCH)
- Turkish Student Association at Clausthal University of Technology
- Clausthal University Sports Clubs
- VDE University Group Clausthal
- VDI Students and Young Engineers Clausthal
- V WI University Group Clausthal
- Scientific Diving Group Clausthal e.V.
Connections
- Agricola Academic Association Clausthal
- Academic Musical Association Ascania Halle-Clausthal in the SV
- Academic sports fraternity Barbara Clausthal in the ATB
- Academic fraternity Glückauf-Salia
- Academic fraternity Orejades
- Academic Association Kristall
- Old Freiberg fraternity "Glückauf" in Clausthal
- Clausthal Mining and Metallurgy Association
- Clausthal "Schlägel und Eisen" fraternity
- Clausthal Wingolf "Catena"
- Corps Borussia
- Corps Hercynia
- Corps Montania
- Landsmannschaft Alemannia-Silesia
- Turnerschaft Rheno-Germania in the CC
- Association of German Students Clausthal