Trowbridge is the county town of Wiltshire, a county in England. It is on the River Biss in the west of the county, 8 miles (13 km) south east of Bath, Somerset, separated by the Mendip Hills, which rise 3 miles (4.8 km) to the west. The town is also 38 miles (61 km) south of Gloucester and 20 miles (32km) south east of Bristol.