Cardiff University Students' Union (CUSU, Welsh:Undeb Myfyrwyr Prifysgol Caerdydd) is the Students' Union for Cardiff University and is located in Cardiff, Wales.
Cardiff University Students' Union supports over 200 student societies and 60 sports clubs with more than 10,000 members.
The Students' Union is also the recognised voice of students at Cardiff University, joining students in campaigning about the issues important to them. The trading subsidiary of CUSU, Cardiff Union Services Limited, manages a purpose built facility in the centre of Cardiff and operates cafes, shops, bars and events that help fund CUSU’s charitable activities. CUSU is based on Park Place and at the Heath Park campus, employing over 100 permanent staff and 300 student staff.