12,500
Population
5,275
Households
528
Postcodes
4
Sectors
About TS21
The TS21 postcode district covers Stillington, Bishopton, Redmarshall, Thorpe Thewles, Carlton, Sedgefield, Long Newton in Stockton-on-Tees. It falls under the Stockton-on-Tees post town. The area has a population of approximately 12,500.