UCD Students' Union (UCDSU) is an organization dedicated to empowering students and advocating for their interests. Founded in 1975 by UCD students, UCDSU has been fighting to defend the rights of UCD students both on-campus and in society for almost half a century. They are present in the university committee structure, ensuring the student voice is heard through their democratically elected officers.

UCDSU campaigns for a quality academic and student experience for all UCD students, regardless of their background. They aim to create a fair and equitable education system and hold it accountable to its main stakeholder: the students. With their motto Empowering Students, UCDSU helps UCD students take ownership of their experience and get the most out of it.

Through SU campaigns and events, UCDSU encourages students to feel empowered and get involved in shaping their university experience. Membership is open to all registered UCD students, and they have the opportunity to elect class reps and officers who represent their interests. The UCDSU office is a resource for students to reach out for support on any academic or non-academic issue.

Overall, UCD Students' Union is committed to ensuring fairness, opportunities, and a voice for the entire student community at UCD