William Dow may refer to:
William Dow (1800–1968), British-born brewer and financier of Montreal, Quebec, Canada Billy Dow (1844–1943), Scottish footballer, see List of Bury F.C. players (1–24 appearances) William Gould Dow (1895–1999), American scientist Bill Dow (cricketer) (1933–2026), Scottish cricketer Bill Dow (born 1951), Canadian actor