20th-century Swiss philosophers

Carl Gustav Jung ( YUUNG, 26 July 1875 – 6 June 1961) was a Swiss psychiatrist and psychoanalyst who founded analytical psychology. Jung's work was influential in the fields of psychiatry, anthropology, archaeology, literature, philosophy, and religious studies. Jung worked as a research scientist at the famous Burghölzli hospital, under Eugen Bleuler. During this time, he came to the attention of Sigmund Freud, the founder of psychoanalysis. The two men conducted a lengthy correspondence and collaborated, for a while, on a joint vision of human psychology.

Ferdinand de Saussure (26 November 1857 – 22 February 1913) was a Swiss linguist, semiotician and philosopher. His ideas laid a foundation for many significant developments in both linguistics and semiotics in the 20th century. He is widely considered one of the founders of 20th-century linguistics and one of two major founders (together with Charles Sanders Peirce) of semiotics, or semiology, as Saussure called it.

Jean Piaget (, , 9 August 1896 – 16 September 1980) was a Swiss psychologist known for his work on child development. Piaget's 1936 theory of cognitive development and epistemological view are together called "genetic epistemology".

Michael Landmann (16 December 1913 in Basel – 25 January 1984 in Haifa) was a Swiss-Jewish philosopher.

Max Lüscher (September 9, 1923 – February 2, 2017) was a Swiss psychotherapist known for inventing the Lüscher color test, a tool for measuring an individual's psychophysical state based on his or her color preferences. Besides research, teaching and practicing psychotherapy in Basel, Lüscher worked for international companies, amongst other things giving color advice. His book The Lüscher Test has been translated into more than 30 languages.

Hans Urs von Balthasar (12 August 1905 – 26 June 1988) was a Swiss theologian and Catholic priest who is considered an important Roman Catholic theologian of the twentieth century. He was appointed a cardinal by Pope John Paul II, but died shortly before the consistory. Joseph Cardinal Ratzinger said in his funeral oration for von Balthasar that "he is right in what he teaches of the faith" and that he "points the way to the sources of living water."

Paul Haeberlin (17 February 1878, in Kesswil – 29 September 1960, in Basel) was a Swiss philosopher who at different times in his career took the standpoint that either religion or theoretical knowledge was the answer to human problems. He always gave philosophy an important role, but religion was to him the only way man could understand his real position in existence. Haeberlin made contributions to characterology and psychotherapeutics, and was especially successful in treating psychopathic youth and teens. Made a full professor of philosophy, psychology and pedagogics at the University of Basel.

Frithjof Schuon (18 June 1907 – 5 May 1998), also known as ʿĪsā Nūr ad-Dīn ʾAḥmad (Arabic: عيسیٰ نور الـدّين أحمد‎) after his conversion to Islam, was an author of German ancestry born in Basel, Switzerland. Schuon is widely recognized as one of the most influential scholars and teachers within the sphere of comparative religion. His religious worldview was influenced by his study of the Hindu philosophy of Advaita Vedanta and Islamic Sufism. He authored numerous books on religion and spirituality as well as being a poet and a painter.

Ferdinand Gonseth (1890–1975) was a Swiss mathematician and philosopher.

Jean Soldini (born 13 March 1956 in Lugano) is a Swiss and French philosopher, art historian and poet.