Erdei or Erdey is a Hungarian topographic surname originally used to denote a person living or working in or near a woodland or forest (). Notable people with the surname include:

Erdei Carlo Erdei (born 1996), Romanian football player Iosif Erdei János Erdei Ferenc Erdei (1910–1971), Hungarian politician Viktor Erdei (1879–1945), Hungarian artist Zsolt Erdei (born 1974), Hungarian boxer

Erdey Dale M. Erdey (born 1954), American politician Tibor Erdey-Grúz (1902–1976), Hungarian chemist and politician

See also