洋狗尾草属（学名：Cynosurus）是禾本科下的一个属。该属共有约6种，分布于东半球的温带地区。

Cynosurus is a genus of Eurasian and North African plants in the grass family. Plants in this genus are known generally as dogstail grass. They are native to the Mediterranean Basin and neighboring regions, but some have been introduced into Australia as well as North and South America.