Zavadsky, (also rendered Zavadskiy, Zavadski, or Zavadskyi), is a Slavic surname. Notable people with the surname include:
Aleksandr Zavadskiy (born 1966), Russian footballer Dmytro Zavadskyi (born 1988), Ukrainian badminton player Dzmitry Zavadski (1972–), Belarusian journalist Lidia Zavadsky (1937–2001), Israeli visual artist Vladimir Zavadsky (1978–2023), Russian soldier Yuri Zavadsky (1894–1977), Soviet and Russian theater director, actor and pedagogue
See also Zawadzki