John Bach (born 5 June 1946) is a British-born New Zealand actor who has acted on stage, television and film over a period of more than four decades. Though born in the United Kingdom, he has spent most of his career living and working in New Zealand.

In 1997, his leading role as the titular detective character of Duggan was created for him, firstly in a couple of telemovies, then in a successful New Zealand series.