Stockton-on-Tees is a local government district and borough in north-east England, with a resident population in 2001 of 178,408.
In addition to Stockton-on-Tees, the borough contains Thornaby-on-Tees, Yarm, Billingham and Norton. Durham Tees Valley Airport is also within the borough.
The core of the town was traditionally in County Durham, but the borough spilled over the river into Yorkshire. It was made part of Cleveland in 1974, and then became a unitary authority on April 1, 1996. For ceremonial purposes the borough is split between County Durham and North Yorkshire.
