Esther Danilovna Epstein (born May 10, 1954) is an American chess player and systems manager, who has won the U.S. Women's Chess Champion in 1991 and 1997. She holds a Woman International Master title.
Still in the USSR, Epstein was the USSR Women's Vice-Champion in 1976. She has played for the U.S. Women's Olympiad team five times.
She is married to chess grandmaster Alexander Ivanov.