Major William Adolphus Chaffey (18 February 1915 – 4 March 1987) was an Australian farmer, distinguished soldier and long serving member of the Parliament of New South Wales. Chaffey represented the electoral district of Tamworth from 1940 to 1973. He also served as the New South Wales Minister for Agriculture from 1965 to 1968. Chaffey succeeded his father, Frank in parliament after the latter's death, and together they served a combined fifty-nine years and nine months in the New South Wales parliament representing the New England region of New South Wales.