Jan Poštulka (born 9 March 1949) is a Czech football coach and ex-football player. Poštulka was a goalkeeper of the Czechoslovak teams Sparta Prague and Bohemians Prague. As a head coach, he enjoyed his greatest success in Central America (Champion of Central America, Champion of Costa Rica, Guatemala Cup Winner, LG Cup Winner) where he worked in the 1990s with the L.D.Alajuelense. As a coach, he spent some years with Sparta Prague.