Ian Bayley Curteis (1 May 1935 – 24 November 2021) was a British dramatist and television director.

Curteis was born in London on 1 May 1935, and began his career as an actor, joining Joan Littlewood's Theatre Workshop in the mid-1950s, and later working in this profession in regional theatres, and as a stage director or producer. His career in television began as a script reader for both the BBC and Granada Television. Curteis joined the staff of the BBC as a trainee director in 1964. The Projected Man (1966), which he directed, is his only cinema film. Around the same time Curteis directed an episode of the BBC2 anthology series, Out of the Unknown, William Trevor's "Walk's End". Both projects had a problematic production; Curteis has disputed the claims of the producers of both.