There are amazing developments in the field of psychology around the world, and these developments are taking place because of the collaboration and innovation that are being promoted by different psychological associations around the world. But have you ever wondered which psychological associations have the largest memberships? Here are the top 10:

1. American Psychological Association : 115,700 — APA is the leading scientific and professional organisation representing psychology in the US, with more than 115,700 researchers, educators, clinicians, consultants and students as its members.

2. British Psychological Association: 49,300 — The British Psychological Society is the representative body for psychology and psychologists in the UK, and is responsible for the promotion of excellence and ethical practice in the science, education, and practical applications of the discipline.

3. Association for Psychological Science: 33,000 — The Association for Psychological Science (previously the American Psychological Society) is a non-profit organisation dedicated to the advancement of scientific psychology and its representation at the national and international level.

4. Spanish Psychological Association : 30,000 — The General Council of Officers ‘Associations of Psychologists was created by Law 7/2005, of 13 May, constituting the coordinating and representative body of the Official Psychologists’ Colleges and the Autonomous Councils, as appropriate, regarding the functions Which are its own and regulated in its statutes, at the national and international levels.

5. Australian Psychological Society = 22,000 — The APS is the largest professional body representing psychologists in Australia.It has a code of ethics which APS members must agree to abide by and a recommendation of appropriate fees charged for services.

6. Federation of German Psychologists’ Associations: 17,500 — The Federation of German Psychologists’ Associations was established by the Association of German Professional Psychologists (BDP) and the German Psychological Society (DGPs) in 1958.

7. Dutch Association of Psychologists: 13,000 —The representation of individual and collective interests of psychologists form the core business of the services provided by the Dutch Association of Psychologists (NIP).

8. Korean Psychological Association: 8,400 — The Korean Psychological Association issues licenses in the areas of clinical psychology, counseling psychology, developmental psychology, industrial and organisational psychology, forensic psychology, addiction psychology and health psychology, coaching psychology, thereby helping majors in psychology advance into the society.

9. Swedish Psychological Association: 8,000 — The Swedish Psychological Association is the union and professional organisation for the country’s psychologists. The association focuses primarily on members’ wages and terms of employment. Also at number 8 is Japanese Psychological Association, with 8,000 members. The Japanese Psychological Association (JPA) was founded as an academic organisation on April 7, 1927. As the oldest national psychological association in Japan, they have contributed to the development of Japanese psychological activities through a membership base that includes both academic researchers and professional practitioners,.

10. Danish Psychological Association: 7163 — The Danish Psychological Association is the official professional and scientific organisation representing psychologists in Denmark. We represent 10.000 professionals and students.

Source: International Union of Psychological Science

In case you’re wondering about the membership of the European Federation of Psychologists’ Association (EFPA), it’s 300,000. I did not include it in the ranking because it’s an umbrella organisation.