Dudley George Simpson (4 October 1922 – 4 November 2017) was an Australian composer and conductor. He was the Principal Conductor of the Royal Opera House orchestra for three years and worked as a composer on British television. He worked on the BBC science-fiction series Doctor Who, for which he composed incidental music during the 1960s and 1970s. When Simpson died aged 95 in 2017, The Guardian wrote that he was "at his most prolific as the creator of incidental music for Doctor Who in the 1960s and 1970s, contributing to 62 stories over almost 300 episodes – more than any other composer."

Among his television work was the music for Moonstrike (1963), theme music for The Last of the Mohicans (1971), theme music for The Brothers (1972), The Tomorrow People (1973), Moonbase 3 (1973), The Ascent of Man (1973) and Blake's 7 (1978). He also composed music for several plays from the BBC Television Shakespeare series.