Catherine Johnson (born 14 October 1957)[1] is a British playwright, producing works for stage and television.

Johnson grew up in Wickwar near Wotton-under-Edge in Gloucestershire, and attended Katharine Lady Berkeley's School in Wotton.

She wrote Rag Doll, using the pseudonym Maxwell Smart, a play about incest and child abuse, which won the competition and was staged by the Bristol Old Vic.

[6] Further plays for the Bush Theatre in London, Bristol Old Vic and Show of Strength followed along with work on television series including Casualty, Love Hurts and Byker Grove.

Catherine is a patron of the Wotton Electric Picture House[4] in Wotton-under-Edge, Bristol's Myrtle Theatre Company[8] and Arts and Community in Thornbury.