Robert George "Rob" Hirst (born 3 September 1955) is an Australian musician from Camden, New South Wales.
He is a founding member of rock band Midnight Oil on drums, percussion and backing vocals (sometimes lead vocals) from the 1970s until the band took a hiatus in 2002.
The band resumed activity as a group in 2017.
Hirst also wrote a book, Willie's Bar & Grill, recounting the experiences on the tour Midnight Oil embarked on shortly after the 11 September terrorist attacks in 2001.