Hašek (feminine: Hašková) is a Czech-language surname that may refer to:
- Dominik Hašek, Czech ice hockey goaltender
- The asteroid 8217 Dominikhašek, named in honour of Dominik Hašek's Olympic gold
- Eliška Hašková-Coolidge, Special Assistant to the U.S. Presidents
- Eduard Hašek, Czech athlete
- Filip Hašek, Czech footballer
- Jaroslav Hašek (1883–1923), Czech writer known for the novel The Good Soldier Švejk
- Asteroid 2734 Hašek named after Jaroslav Hašek
- Ivan Hašek, Czech footballer and coach
- Martin Hašek, Czech footballer and coach
- Martin Hašek (footballer, born 1995), Czech footballer
- Michal Hašek, Czech politician