Grace Lenczyk Cronin (September 12, 1927 – December 13, 2013) was an American amateur golfer who won the 1947 All American Open. During her career, Lenczyk was the winner of the Canadian Women's Amateur from 1947 to 1948 and the U.S. Women's Amateur in 1948. In team events, she was a member of the winning American team at the 1948 and 1950 Curtis Cup. Lenczyk was inducted into the Connecticut Golf Hall of Fame in 1969.