松鸡科，学名Tetraonidae，在鸟类传统分类系统中是鸟纲鸡形目中的一个科。所有的松鸡都生活在北半球，大多为留鸟。

松鸡主要为植食性，但有时也吃昆虫，尤其是幼鸟。

松鸡科一共包括七个属：

松鸡是相当结实的鸡类。它们的身高范围从31厘米（12英寸）到95厘米（37英寸），体重范围从0.3公斤（11盎司），到6.5公斤（14磅）。公鸡较母鸡重两倍，鼻孔有羽毛。它们的脚到脚趾都生有羽毛，冬季时连脚趾都长了羽毛，不像其他的鸡类，他们脚上没有马刺。

Grouse /ˈɡraʊs/ are a group of birds from the order Galliformes, in the family Phasianidae. Grouse are frequently assigned to the subfamily Tetraoninae (sometimes Tetraonidae), a classification supported by mitochondrial DNA sequence studies, and applied by the American Ornithologists' Union, ITIS, and others. Grouse inhabit temperate and subarctic regions of the northern hemisphere, from pine forests to moorland and mountainside, from 83° North (rock ptarmigan in northern Greenland) to 28° North (Attwater's prairie chicken in Texas).