The Stockton and Darlington Railway, opened in 1825, was the world's first passenger railway.
In 1964 the county borough was divided between three new districts, Stockton-on-Tees, Middlesbrough and Langbaurgh (later renamed Langbaurgh-on-Tees). The three districts, together with Hartlepool, constituted the new county of Cleveland.
The county in turn was abolished in 1996 and divided along the line of the River Tees between two ceremonial counties, County Durham and North Yorkshire. For administrative purposes it was divided between four unitary authorities:
- Hartlepool (County Durham)
- Redcar and Cleveland (formerly Langbaurgh-on-Tees; North Yorkshire)
- Middlesbrough (North Yorkshire)
- Stockton-on-Tees (divided between County Durham and North Yorkshire).
Cleveland Police (formerly Cleveland Constabulary) still exists, covering the former county.
The Teesside CHE Group was founded in 1970.
Cleveland Police has an LGB Support Network