Trowbridge is the county town of Wiltshire, England; situated on the River Biss in the west of the county, close to the border with Somerset. The town lies 8 miles (13 km) south-east of Bath, 31 miles (50 km) south-west of Swindon and 20 miles (32 km) south-east of Bristol. The parish had a population of 37,169 in 2021.

Thomas Helliker, known as the Trowbridge Martyr, was a figure in early English trade union history who was hanged, aged 19, for his alleged role in machine-breaking at a Wiltshire woollen mill. His conviction has been challenged as controversial and faulty, and he is now regarded as a victim of anti-Luddite sentiment.