Růžička or Ružička or Ruzicka may refer to:
- Růžička = Czech surname
- Ružička = Slovak surname
- Lavoslav Ružička (1887–1976), Croatian chemist (Nobel Prize in Chemistry 1939)
- Martin Růžička, Czech ice hockey player
- Peter Ruzicka (born 1948), German composer
- Rudolf Růžička (composer) (born 1941), Czech composer
- Rudolph Ruzicka (1883–1978), Czech-born American illustrator and book designer
- František Ružička (born 1966), Slovak diplomat
- Martin Růžička, Czech ice hockey player
- Dan Růžička (b.1991), Czech ice hockey player
- Vladimír Růžička (ice hockey b. 1963), Czech ice hockey player and coach
- Vladimír Růžička (ice hockey b. 1989), Czech ice hockey player
- Drahomír Josef Růžička (1870–1960), Czech-born American photographer
- Štefan Ružička (born 1985), Slovak ice hockey player
- Marla Ruzicka (1976–2005), American activist-turned-aid worker
- Ruzicka (TV series), a Canadian television series
| This page or section lists people with the surname Ružička. If an internal link intending to refer to a specific person led you to this page, you may wish to change that link by adding the person's given name(s) to the link. |