Romaniuk or Romanyuk (Ukrainian: Романюк) is a polish and ukrainian surname. It may refer to:
- Greg Romaniuk (born 1971), Canadian-American curler
- Kyrylo Romanyuk (born 2001), Ukrainian footballer
- Patriarch Volodomyr (Romaniuk) (1925–1995), Patriarch of the Ukrainian Orthodox Church – Kiev Patriarchate
- Roman Romanyuk (born 1961), Ukrainian politician
- Russ Romaniuk (born 1970), Canadian ice hockey player
- Vitaliy Romanyuk (born 1984), Ukrainian footballer
- Wojciech Romaniuk (born 1970), Polish politician
- Yuriy Romanyuk (born 1997), Ukrainian footballer
- Steve G Romaniuk (born 1963), American computer scientist specializing in AI, speculative fiction & science fiction author, editor, publisher, speaker, founder of 5 high-tech companies, and more.