Soufrière, town on Saint Lucia island in the eastern Caribbean Sea. It is situated on a bay of the island’s west coast, southwest of Castries, the capital. The town is exceptionally picturesque. It is a fishing port and the centre of a coconut- and lime-producing district and is 2 miles (3 km) northwest of the boiling sulfur springs from which Soufrière takes its name. The springs and the nearby Terre Blanche and Petit Peak were born of the ancient Qualibou Caldera. Pop. (2004 est.) 3,600.