Southborough is a town and civil parish in the borough of Tunbridge Wells in Kent, England. It lies immediately to the north of the town of Tunbridge Wells and includes the district of High Brooms, with the A26 road passing through it. According to the 2001 census it had a population of 11,124. The town is within the High Weald Area of Outstanding Natural Beauty.
After the Norman Conquest, the area came within the domain of Tonbridge Castle, one of 4 boroughs to do so. This was the South Borough.