José Ádem Chaín (born in Tuxpan, Veracruz, October 27, 1921; died February 14, 1991) was a Mexican mathematician who worked in algebraic topology, and proved the Ádem relations between Steenrod squares.
He did postgraduate work at Princeton University where his advisor was Norman Steenrod.
He was elected to El Colegio Nacional on 4 April 1960.