Middlesbrough Borough Police, sometimes referred to as Middlesbrough Constabulary, was the police force of Middlesbrough, England, established in 1853. On 1 April 1968, the force was amalgamated into Teesside Constabulary, which itself became part of Cleveland Constabulary in 1974. In 1934, the force had a strength of one Chief Constable, one Chief Inspector, six Inspectors, twenty Sergeants, 136 Constables, three Matrons, and eight civilian staff.