Blyth Valley was a local government district with borough status in south-east Northumberland, England, bordering the North Sea and Tyne and Wear.

The two principal towns were Blyth and Cramlington.

The borough was formed on 1 April 1974 by the merger of the borough of Blyth, part of Seaton Valley urban district and part of the borough of Whitley Bay.

[1] The district council was abolished as part of the 2009 structural changes to local government in England effective from 1 April 2009 with responsibilities being transferred to Northumberland County Council, a unitary authority.

This Northumberland location article is a stub.