Sediq Afghan (born 1958 in Kabul) is an Afghan philosopher and mathematician, currently head of the International Center for Mathematical Philosophy, Kabul. He is also a political activist and had a proeminent role in manifestations in Kabul about Afghanistan- and Islam-related issues, including an anti-American protest in 2003,^[1] a hunger strike to protest over beatings of journalists by Afghan security officers in 2006, and another one to protest about the 2008 Danish Muhammad cartoons.

He completed his preliminary education in Afghanistan and received his doctorate in mathematics from the Moscow University.