Blackburn Hundred, Historic administrative division in Lancashire, England

Blackburn Hundred was a historic administrative unit in East Lancashire that stretched across extensive lands with Yorkshire's boundaries to the north and east and the River Ribble to the west. The territory was divided into two main parishes that gradually split into smaller ones over the centuries as the population grew.

In 1102 King Henry I granted the territory to Robert de Lacy, making it a central part of the honor of Clitheroe. Over subsequent centuries the region became an important component of England's northern administrative system.

The region contained two major parishes, Blackburn and Whalley, which expanded into multiple smaller parishes as the population increased over centuries.

Clitheroe Castle served as the administrative center where the hundred court met every three weeks to handle local legal matters. Visitors today can see the castle's ruins positioned on a hilltop overlooking the town, offering views across the historic territory.

The territory included several notable hills such as Pendle Hill at 558 meters, Wolfsty Fell at 518 meters, and Boulsworth at 518 meters. These summits shaped the landscape and served as geographical landmarks for the people living across the region.