Mellor Brook is a village which straddles the borders of the Boroughs of Ribble Valley and South Ribble in Lancashire, England.The village of Mellor Brook is approximately 4 miles (6 km) north-west of Blackburn.The geographical area of Mellor Brook is quite small, covering an area of approximately 4 square miles (10 km2). There is a bakery located in the heart of Mellor Brook.