Rudolf Geigy (20 December 1902 – 8 March 1995) was a Swiss biologist and a professor of embryology and genetics at the University of Basel.

[2] He was the son of Johann Rudolf Geigy-Merian and Helene Schlumberger[3] who belonged to the family that established Geigy, a major pharmaceutical firm.

[1][7] He specialized in disease-transmitting vectors including tsetse flies,[2] mites, and ticks.

On 8 March 1995, due to health issues, the couple chose to die by assisted suicide through the euthanasia organization Exit (Switzerland), which led to a major debate on euthanasia in Switzerland.

[9][10] During his life, Geigy helped establish a number of institutions which have since merged.