All students of Cromwell College belong to the Cromwell College Students’ Association. This is an associated body of the University of Queensland Union in the category of Colleges. It is separate to Cromwell College itself, but must operate in keeping with the mission and values of the College.

The aims of the Association are:
(i) To serve and represent the members of the Association in all matters affecting their activities and interests;
(ii) To promote within the college a community spirit by means of social, cultural and sporting activities;
(iii) To correlate the interests of the members of the Association with the policy of the College; and
(iv) To regulate college policy and take responsibility for maintaining college discipline in so far as it is within its power to do so.

The Association is governed according to the Students’ Association Constitution.