Under the 2023 Periodic Review of Westminster constituencies, the seat was abolished, with the majority of its contents - excluding the town of Blyth itself - being absorbed into the new constituency of Cramlington and Killingworth, to be first contested at the 2024 general election.

[4] The constituency of Blyth was established under the Representation of the People Act 1948 for the 1950 general election.

Following the reorganisation of local authorities resulting from the Local Government Act 1972, it was renamed Blyth Valley for the 1983 general election to correspond with the newly formed Borough of Blyth Valley.

In the 2019 general election, Blyth Valley was the third seat to declare and the first Conservative victory of the election,[5] pointing towards many similar Conservative victories in Labour's Red Wall[6] as the night went on.

Small area in the south (Backworth and Earsdon), which was now part of the metropolitan borough of North Tyneside in Tyne and Wear, transferred to Wallsend.