马湾（英语：Ma Wan）是香港新界的一个岛屿，位于大屿山及青衣之间。行政上属于荃湾区。马湾面积为0.96平方公里。

马湾的东西两面分别由两道海峡隔开。东为马湾海峡，西为汲水门。马湾的北面的对岸为新界的深井。

马湾原名妈湾，得名于妈祖，即天后娘娘。海滩北面有一所两进式设计的天后古庙，相传由海盗张保仔所建的，用作庇佑当地人。

马湾原本为一个渔村，马湾旧村有超过200年历史，最繁盛的时期为1960年代及1970年代，当时岛上居民主要以耕作、捕鱼和晒虾膏维生。随着1997年青马大桥落成，该处被大兴土木。2002年，位于东湾附近的私人住宅区珀丽湾入伙。2007年7月1日，马湾公园第一期正式开幕。2009年5月25日挪亚方舟博览馆及挪亚方舟酒店落成启用。

Ma Wan is an island of Hong Kong, located between Lantau Island and Tsing Yi Island, with an area of 0.97 square kilometres (240 acres). Administratively, it is part of Tsuen Wan District.

The Lantau Link that passes through Ma Wan was constructed in the mid-1990s as part of the Hong Kong Government's Rose Garden plan to connect the new Hong Kong International Airport to the city centre. Its development fostered plans to develop the island. Today, a large part of Ma Wan is occupied by the Park Island apartment complex. A theme park, named Ma Wan Park was built to accompany the housing project, with its first phase opened on 1 July 2007.