Khyzhniak, Khizhnyak, Khizhniak or Khyzhnyak () is a Ukrainian surname. Notable people with the surname include:
Antonina Khyzhniak (born 1990), Ukrainian actress Oleksandr Khyzhniak (born 1995), Ukrainian amateur boxer Oleksii Khyzhniak (soldier) (1989–2022), Ukrainian soldier Oleksii Khyzhniak (footballer) (born 2001), Ukrainian footballer Vitaliy Khyzhniak (1934–2025), Ukrainian politician
See also
de:Chyschnjak nds:Chyschnjak ru:Хижняк uk:Хижняк