毛桦（拉丁语：Betula pubescens）是桦树的一种，原产地是北欧、冰岛、北亚、格陵兰岛。毛桦是一种落叶乔木，高约10至20米。毛桦是白桦的亲属物种，外表极为相似。

Betula pubescens (syn. Betula alba; downy birch; also known as moor birch, white birch, European white birch or hairy birch) is a species of birch, native and abundant throughout northern Europe, Iceland, northern Asia and Greenland.