William Ralph Boucher Hassell (born 6 June 1943) is an Australian former Liberal Party politician who was Leader of the Opposition in Western Australia during the mid-1980s. He was a member of the Western Australian Legislative Assembly seat of Cottesloe between 1977 and 1990.
After attending Hale School, Hassell attended the University of Western Australia (UWA), graduating in 1965 with a Bachelor of Laws. He entered legal practice in 1966.
In 1977 Hassell was elected to the Western Australian Legislative Assembly seat of Cottesloe, representing the Liberal Party.
He was Leader of the Opposition between 1984 and 1986 before being replaced by Barry MacKinnon.
Hassell's subsequent political career saw him serve as deputy mayor on Nedlands Council and in this capacity in November 2019, he stated that âÂÂAlthough I loathe and detest welcomes to the country, I sit through them patiently when we have these ceremonies.â Seven months later in June 2020, Hassell tendered his resignation as deputy mayor, and from the council.
Hassell is a monarchist and was a convenor for the Australians for Constitutional Monarchy.