Gladys Helena Carson (8 February 1903 – 17 November 1987), later known by her married name Gladys Hewitt, was an English competitive swimmer who represented Great Britain at the 1924 Summer Olympics in Paris. She won a bronze medal for coming third in the event final of the women's 200-metre breaststroke in a time of 3:35.4, finishing behind fellow Briton Lucy Morton (3:32.2) and American Agnes Geraghty (3:34.0).
Carson was born in Leicester, England.