Woźniak (feminine: Woźniak/Woźniakowa, plural Woźniakowie) is the 10th most common surname in Poland (88,040 people).
Notable people with the Woźniak surname:
- Aleksandra Wozniak, Canadian tennis player
- Dagmara Wozniak, American Olympic fencer
- John Wozniak, musician
- John Wozniak (Pennsylvania), Pennsylvania state senator
- Max Wosniak, football (soccer) player and manager
- Paulina Woźniak, Polish swimmer
- Paweł Woźniak, hurdler
- Piotr Woźniak (researcher), lead programmer of the SuperMemo learning software
- Piotr Woźniak (politician), Polish politician
- Radim Wozniak, Czech footballer
- Steve Wozniak, American computer engineer and co-founder of Apple Computer
- Troy Wozniak, Australian rugby league player
