Claudia Anne Kolb (born December 19, 1949), also known by her married name Claudia Thomas, is an American former competition swimmer, two-time Olympic champion, and former world record-holder in four events. Kolb represented the United States as a 14-year-old at the 1964 Summer Olympics in Tokyo, Japan. She competed in the women's 200-meter breaststroke, and received the silver medal for her second-place performance (2:47.6) behind Soviet Galina Prozumenshchikova, who set a new Olympic record (2:46.4). She lives in Oregon.