[1] At the 1932 Summer Olympics in Los Angeles, Johns represented the United States at the age of 17.

[2] She won a gold medal in the women's 4×100-meter freestyle relay with U.S. teammates Eleanor Garatti, Helene Madison and Josephine McKim.

[2][3] The American women set a new world record in the event with a time of 4:38.0, beating teams from the Netherlands (silver) and Great Britain (bronze) by nine and fourteen seconds, respectively.

[6] Johns married Eugene Carroll in 1937 and moved to Swansea, Massachusetts wherein they had two daughters, Deborah and Judith.

She was inducted into the Rhode Island Heritage Hall of Fame for her achievements as an Olympic swimmer in 2004.