St Peter's Church (formerly Holy Trinity Church) is in Bank Street, Darwen, Lancashire, England. It is an active Anglican parish church in the deanery of Blackburn with Darwen, the archdeaconry of Blackburn, and the diocese of Blackburn. The church is recorded in the National Heritage List for England as a designated Grade II* listed building. It was a Commissioners' church, having received a grant towards its construction from the Church Building Commission.