The International Association of Physics Students (IAPS) is a non-profit umbrella organization for physics students associations. Its official seat is in Mulhouse, France in the headquarters of the European Physical Society. It was founded in 1987 in Debrecen, Hungary.

IAPS is an association of physics students and student societies from around the globe, working to promote peaceful collaboration amongst its members. These are represented by national and local committees, who meet regularly to ensure the relevance of activities. Since 1987, IAPS has worked continuously to support friendly relations and collaboration between physics students. The group supports its members in their academic and professional work by discussing and acting on scientific, social and cultural issues. IAPS is a recognised non-governmental organisation run entirely by students from around the world.

IAPS runs an annual International Conference of Physics Students (ICPS), one of the biggest student organized conferences in the world. IAPS also organizes visits to global research institutions such as CERN or Culham Centre for Fusion Energy, international physics competitions, summer schools, exchange programmes and multinational meetings.

On a daily basis, IAPS is run by an Executive Committee, which is elected at the Annual General Meeting (AGM), held during the ICPS with the participation of all member societies. Most of the activities are run through the help of student volunteers, whose collaboration is necessary to ensure that all activities are offered at prices that allow participation from countries with weaker economies.

Throughout its existence, IAPS has been accumulating a number of partnerships with several international organizations. Between the most long-standing collaborators stand the European Physical Society (EPS) and the International Union of Pure and Applied Physics (IUPAP)—in which IAPS constitutes the Affiliated Commission of Physics Students (AC5). IAPS continuously pursues collaborative partnership efforts with other organizations to have a positive impact in the global scientific community.

IAPS is run by an Executive Committee, which is elected at the Annual General Meeting (AGM). IAPS members may be national physics student organisations, called National Committees (NC), physics student association localised at one university or city, called Local Committees (LC) and individual members (IM) if none of the before are present where one studies. In a broad sense, all the members of NCs and LCs, as well as IMs, are members of IAPS. Membership costs are calculated for each applicant based on the type of committee and the GDP of applicant countries.

The IAPS Executive Committee (EC) is currently composed of 9 students, elected by representatives of the member societies. The 2022/23 EC is composed of:

Students of physics or related subjects who do not have access to an NC or LC may join as IMs. Only IAPS members may attend IAPS events such as ICPS. Currently IAPS has around 150 individual members.