Sonya Klopfer Dunfield is an American Figure skater. She is the 1951 American. She won the bronze medal at the 1951 World Figure Skating Championships and the silver in 1952. She placed 4th at the 1952 Winter Olympics.
Following her retirement from competitive skating, she married Peter Dunfield and worked as a coach. She coached Dorothy Hamill, Elizabeth Manley, and Scott Smith (figure skater) among many others. She was inducted into the Skate Canada Hall of Fame in 2001.
Klopfer was named after Sonja Henie.