毛堇菜（学名：Viola hirta）为堇菜科堇菜属的植物。分布于欧洲、俄罗斯以及中国大陆的**等地，生长于海拔1,400米至2,000米的地区，常生于林缘、草地和灌丛中。

Viola hirta is a species of the plant genus Viola. It is also called the hairy violet. As with the sweet violet, no fossil seeds of this species have been found. It is confined to the cold temperate zone, in Europe, north and west Asia, extending as far as northwest India. It is absent in Wales from Brecon and Radnor, Pembroke, Cardigan, Merioneth, and from Mid Lancs, and the Isle of Man, but elsewhere it is universal. In Scotland it does not occur in Roxburgh, Berwick, Haddington, Edinburgh, Fife, Forfar, Kincardine. From Forfar it ranges to the south of England, and is found at a height of 1000 ft. in Yorks. It occurs also in Ireland.