Judith Barker (born June 22, 1943 in Oldham, Lancashire) is a British actress, best known for her role as the upwardly mobile homewrecker Janet Reid on the soap opera Coronation Street, which she played from 1969 to 1977.

Since her departure from Coronation Street, Reid is mostly a character actress on television drama, with exceptions being her role on Brookside, playing the role of Audrey Manners from 1995 to 1996. She also manages her own Dance and Drama academy where she teaches drama to students of different ages. These drama classes are held at a church hall in her home town of Oldham. She runs the classes with her daughter in law Adele Parry. These classes consist of games, improvisation, shows and LAMDA exams.

Judith has appeared as Estelle Cooper in waterloo road and has also appeared in the film Mrs. Potter.