Jašek (feminine: Jašková) or Jasek is a surname. It may refer to:
Jašek Jaroslav Jašek (1946–2010), orienteering competitor who competed for Czechoslovakia Lukáš Jašek (born 1997), Czech ice hockey player
Jasek Magdalena Jasek, Polish fashion model Richard Jasek (born 1964/1965), Czechoslovakia-born Australian television producer, writer and director