William Morrow (15 September 1872 – 3 July 1934) was an Australian politician. He was a member of the South Australian Legislative Council from 1915 to 1934, representing three successive conservative parties, the Liberal Union, Liberal Federation and Liberal and Country League.
William Morrow was born in Bairnsdale, Victoria in 1872, and had early experience as a "printer's devil" and machine operator. He moved to Queensland, where he learned the craft of a tailor, then moved to Port Pirie, South Australia in 1891, entering into partnership as tailors and outfitters on Alexander Street with William J. Paull, whom he bought out 12 months later. In 1899 he built new premises at the corner of Ellen and David streets, where the Commonwealth Bank and other businesses were later situated. He sold his business to H. W. "Bert" Overland and left Port Pirie in 1915.
Morrow was elected councillor for North Ward of the Corporate Town of Port Pirie in 1904, and he was appointed mayor in December 1909, M. L. Warren succeeding him as councillor. Port Pirie experienced considerable progress during his two years in the mayoral chair, but his skills as chairman tested regularly, as the parties were neatly balanced and he was continually having to exercise his casting vote.
He stood for the Assembly seat of Stanley (which then included Port Pirie) at the election of February 1912. Three members were required, and his two fellow Liberal candidates were Henry Barwell and Elliot McDonald; with Harry Jackson, Clarence Goode and William Cole standing for Labor. The election was fiercely fought, and the results were close: Jackson, 6,106; Goode, 6,092; Cole, 5,811; McDonald, 5,708; Barwell, 5,647; Morrow, 5,613. One of the candidates (McDonald) suggested that inefficient scrutiny and vote counting had helped ensure Labor's victory.