Helen Elizabeth Sobel Smith (née Martin; May 22, 1909 – September 11, 1969) was an American bridge player. She is said to have been the "greatest woman bridge player of all time" and "may well have been the most brilliant card player of all time." She won 35 North American Bridge Championships, and was the first woman to play in the Bermuda Bowl. She was a long-time partner of Charles Goren.