A students' union, student government, free student union, student senate, students' association, guild of students, or government of student body is a student organization present in many colleges, universities, and high schools. In higher education, the students' union is often accorded its own building on the campus, dedicated to social, organizational activities, representation, and academic support of the membership.
In the United States, student union many times only refers to a physical building owned by the university with the purpose to provide services for students without a governing body also referred to as a student activity center, although the Association of College Unions International (largely US-based) has hundreds of campus organizational members). Outside the US, student union and students' union refer to a representative body, as distinct from a student activity centre.
Depending on the country, the purpose, assembly, method, and implementation of the group might vary. Universally, the purpose of students' union or student government is to represent fellow students in some fashion.
In some cases, students' unions are run by students, independent of the educational facility. The purpose of these organizations is to represent students both within the institution and externally, including on local and national issues. Students' unions are also responsible for providing a variety of services to students. Depending on the organization's makeup, students can get involved in the union by becoming active in a committee, by attending councils and general meetings, or by becoming an elected officer.
Some students' unions are politicized bodies, and often serve as a training ground for aspiring politicians. Students' unions generally have similar aims irrespective of the extent of politicization, usually focusing on providing students with facilities, support, and services.
Some students' unions often officially recognize and allocate an annual budget to other organizations on campus. In some institutions, postgraduate students are within the general students' unions, whereas in others they have their own postgraduate representative body. In some cases, graduate students lack formal representation in student government.