Blackridings Mill, Oldham was a cotton waste mill lying off Block Lane in the Werneth area of Oldham, Greater Manchester. It was built before 1861 and ceased spinning between 1875 and 1880. It was then used for flock manufacture and processing cotton waste. It was taken over by the Lancashire Cotton Corporation in the 1930s and passed to Courtaulds in 1964. Production ended in 1973 and the building was demolished in 1975.