坪洲（英语：Peng Chau）是香港的一个岛屿，地区行政上属于离岛区。岛屿位于大屿山愉景湾之东南、梅窝之东北，喜灵洲之北，面积为0.99平方公里。

坪洲外形像一个「凹」字，陷下去的地方是东湾。南、北面分别称为南湾和北湾。手指山是全岛最高点，海拔95米，可以远眺香港迪士尼乐园及愉景湾。岛上有路连接大利岛，大利上现时有污水处理厂。东北方的尽头有「钓鱼石」。

坪洲的商舖集中在码头一带。

Peng Chau (Chinese:坪洲) is a small island located off the north-eastern coast of Lantau Island, Hong Kong. It is known for its small island lifestyle, accessibility to fresh seafood, and several temples located around the island.