In the past, this region is known by many names. Popularly called the West until the early 20th century is "Ligor" assumed the Portuguese came to trade in the early Ayutthaya period was called before. The distortion of the word "city" part of the name "Si Thammarat" comes from the name of the king who ruled in the past. His name was "Lord Sri democracy Sokarat" (Dynasty Sri democracy Sokarat) means. "As a city of majestic king virtuous" or "City of the Great King of morality.