Martyniuk (Polish), Мартинюк (Ukrainian, transcribed as Martynyuk), or Мартынюк (Russian, transcribed as Martynyuk) is a patronimical surname of Ukrainian origin, it means son of Martyn.

• Alexander Martynyuk (1945–2022), ice hockey player who played for the Soviet Hockey League
• Dave Martyniuk, fictional character in Guy Gavriel Kay's fantasy trilogy "The Fionavar Tapestry"
• Fedor Martyanovych Martyniuk, president of the Football Federation of the Ukrainian SSR
• Georgy Martyniuk (1940–2014), Russian actor
• Leonid Martynyuk (born 1978), Russian opposition journalist
• Nikolai Martynyuk (1934–2021), Soviet and Russian naval officer
• Teodor Martynyuk (born 1974), Ukrainian Greek Catholic hierarch.
• Wacław Martyniuk (born 1949), Polish politician
• Yaroslav Martynyuk (born 1989), Ukrainian football midfielder

• All pages with titles containing Martynyuk
• All pages with titles containing Martyniuk