Zatko or Zaťko is a surname. Notable people with the surname include:
Dušan Zaťko (born 1954), Czechoslovak slalom canoeist Juraj Zaťko (born 1987), Slovak volleyballer Peter Zaťko (1903–1978), Slovak economist Peter Zaťko (born 1983), Slovak wheelchair curler Peiter Zatko (born 1970), American computer security researcher Štefan Zaťko (born 1962), Slovak football manager
See also Zatko v. California