John Bach (born 5 June 1946) is a New Zealand actor who has acted on stage, television and film over a period of more than three decades. Though born in Wales, he has spent most of his career living and working in New Zealand.
International audiences are most likely to have seen Bach as the Gondorian Ranger Madril in the second and third movies of The Lord of the Rings film trilogy (2001￢ﾀﾓ2003). His leading roles in New Zealand television include playing the titular Detective Inspector John Duggan in the Duggan telemovies and television series, one of the truckdriving brothers in series Roche, and time on long-running soap opera Close to Home. In 1992 he starred as Scottish inventor Alexander Graham Bell in awardwinning telemovie The Sound and the Silence. In 1999 he played the Earl of Sackville in an episode of the TV miniseries A Twist in the Tale.
Bach's Australian work includes science fiction series Farscape, playing Mike Power in based on a true story mini-series The Great Bookie Robbery (1986), and as Sir Ian Hamilton in the 2015 TV miniseries Gallipoli.
In 2010 Bach appeared in NZ science fiction series This Is Not My Life as the sinister Harry Sheridan, as magistrate Titus Calavius in Spartacus: Blood and Sand and in an episode of Legend of the Seeker.
He has also appeared in several New Zealand films, including Utu, Carry Me Back, Goodbye Pork Pie, Pallet on the Floor, Old Scores (in which he had a central role), and Beyond Reasonable Doubt.