Hallik is an Estonian surname. Notable people with the surname include:
Helger Hallik (born 1972), Estonian wrestler Klara Hallik (1933–2025), Estonian politician and political scientist Külli Hallik (born 1954), Estonian skier and coach Reinar Hallik (born 1984), Estonian basketball player
See also Arvo Hallik, husband of Kaja Kallas, Estonian politician and diplomat Halligen (singular Hallig), small islands in the North Sea