Bamble is a municipality in Telemark county, Norway. It is part of the traditional region of Grenland. The administrative centre of the municipality is the village of Langesund.The Old Norse form of the name was Bamblar (a plural form). The name could be related to the word bembel m 'belly' (used in the meaning 'round hill/mountain'). The name was written "Bamle" in the period 1889-1917.
The coat-of-arms is from modern times. They were granted on 12 December 1986. The arms show a gold-colored ship's wheel on a blue background. The arms are nearly identical to the former arms of Stathelle, which along with Langesund was merged with the municipality of Bamble at on 1 January 1964. Sailing and fishing have always been of great importance for the area, and a ship's wheel was thus an appropriate symbol.