The Borough of Darlington is a unitary authority area with borough status in County Durham, England. Since 1997 Darlington Borough Council has been a unitary authority; it is independent from Durham County Council. It is named after its largest settlement, the town of Darlington, where the council is based. The borough also includes a rural area surrounding the town which contains several villages. The population of the borough at the 2021 census was 107,800,[5] of which over 86% (93,015) lived in the built-up area of Darlington itself.[6]
Since 2016 the council has been a member of the Tees Valley Combined Authority, which has been led by the directly elected Tees Valley Mayor since 2017.
The neighbouring districts are the County Durham district to the north and west, Stockton-on-Tees to the east and North Yorkshire to the south, the River Tees forming the border for the latter.