Blyth Valley is a former local government district located in Northumberland, England. It was established in 1974 and included the towns of Blyth, Cramlington, and Seaton Delaval. The area is known for its coastal scenery and industrial history, particularly in coal mining and shipbuilding. In 2009, Blyth Valley was merged into the larger Northumberland County Council as part of a reorganization of local government. The region features various parks and recreational areas, making it a pleasant place for outdoor activities. The local economy has diversified, with a focus on renewable energy and services in recent years.