The undergraduate students' association, also known as St. John’s College Students’ Association (SJCSA) was established in 1956.
Its formal name is “St. John’s College Students’ Association, HKUSU”. It is an affiliated sub-organisation of the Hong Kong University Students’ Union. The Students’ Association is governed by the Constitution, the By-Laws and the Internal Regulations.
The Students' Association is active in protecting the interests of students, coordinating various activities and providing student entertainment. The SJCSA executive committee is elected annually by students who are currently St. John’s College members. The Students' Association consists of the Council of Directors and Officers.