白浪岛（又译褐海岛，英语：Brownsea Island），英国英格兰多塞特郡珀贝克区普勒港最大岛屿，国家名胜古迹信托资产。白浪岛的极大部分是开放给公众参观的，包含有多种野生动物栖息的森林林地和石楠林地，连带包含可眺望普勒港和波白克半岛的峭壁顶端。

白浪岛也是在1907年，童军运动第一次进行露营的所在地。公众渡轮和私人游艇皆可以抵达本岛；2002年时总共有105,938人次参访。本岛的名称来自盎格鲁萨克逊语，Brūnoces īeg＝Brūnoc's island。

Brownsea Island (also archaically known as Branksea) is the largest of the islands in Poole Harbour in the county of Dorset, England. The island is owned by the National Trust. Much of the island is open to the public and includes areas of woodland and heath with a wide variety of wildlife, together with cliff top views across Poole Harbour and the Isle of Purbeck.