William (or Bill) Archer may refer to:
William Archer (British politician) (1677–1739), British politician
Bill Archer (businessman), British businessman
William Andrew Archer (1894–1973), American economic botanist and plant collector
William Archer (architect) (1820–1874), Tasmanian architect, naturalist, and politician
William Archer (New South Wales politician) (1831–1925), member of the New South Wales Legislative Assembly
William Archer (critic) (1856–1924), Scottish dramatic critic and translator of Ibsen
William Archer (naturalist) (1830–1897), Irish naturalist and microscopist especially interested in Protozoa and Desmids
William Archer (Toronto politician) (1919–2005), Canadian municipal politician
William Reynolds Archer Jr. (born 1928), U.S. Representative from Texas
William S. Archer (1789–1855), U.S. Senator and Representative from Virginia