Hašek is a common Czech surname. The feminine gender is Hašková.
Hašek may refer to:
- Dominik Hašek – Czech ice hockey goaltender
- The asteroid 8217 Dominikhašek, named in honour of Dominik's Olympic gold
- Jaroslav Hašek (1883–1923) – Czech writer of The Good Soldier Švejk fame
- Asteroid 2734 Hašek named after Jaroslav Hašek
- Ivan Hašek – Czech footballer and coach
- Martin Hašek – Czech footballer and coach