William Mercer

William Mercer may refer to:

• Billy Mercer (rugby league) (1905–1965), rugby league footballer of the 1930s for England and St Helens RLFC
• William Mercer (cricketer) (1922–1989), English cricketer
• Willie Mercer (1874–1932), Scottish footballer

• William Mercer (poet) (c. 1605–c. 1675), Scottish poet and army officer
• William Thomas Mercer (1821–1879), British Colonial Secretary in Hong Kong, 1859–1868
• William W. Mercer (born 1964), American politician from Montana and former United States Attorney
• William (Rosko) Mercer (1927–2000), known as Rosko, American news announcer and disc jockey
• Bill Mercer (1926–2025), American sportscaster
• William Mercer (Australian politician) (1796–1871), British Army officer, landowner, pastoralist, and politician in colonial New South Wales

• Billy Mercer (disambiguation)