Jaén (), also spelled Djaen, is a Spanish surname, after the city of Jaén. Notable people with the surname include:
Álvaro Jaén (born 1981), Spanish politician Diana Jaén (born 1993), Panamanian model Miguel Ángel López Jaén (born 1982), Spanish tennis player Sabetay Djaen (1883–1947), Bulgarian-Argentinian Sephardi rabbi