Trinity College Dublin Students' Union

Trinity College Dublin Students' Union (or TCDSU) is a students' union and the recognised representative body of students of Trinity College Dublin. Its role is to provide a representative channel between all students (undergraduates and postgraduates) and the authorities of the College as well as to provide services to these students. TCDSU is a constituent organisation of the Union of Students in Ireland.

The day-to-day business and affairs of the Union are run out of Mandela House (also known as Teach a Sé) and managed by the Sabbatical Officers and the Administrative Officer, together with members of the union forum. The Sabbatical Officerships include: the President, Education Officer, Welfare Officer, Communications and Marketing Officer and Entertainments Officer (aka Ents Officer) and are elected on an annual basis; all capitated students are entitled to vote. The President, Welfare & Equality Officer, and Education Officer are elected members of the College Board. The Education Officer and Faculty Convenors (STEM, AHSS, and Health Sciences) are elected members of the University Council.