👉 Wiltshire is a county in South Wales, England. It's located along the Severn estuary and borders Dorset to the east. The county seat is Wiltborough, which was once part of Dorchester but is now part of Wiltshire. The name "wiltshire" comes from the Welsh word "wil-tyse," meaning "the place where the water runs." This term reflects the river that flows through the county, the Severn, and its influence on