William Marsden may refer to:
- William Marsden (diplomat) (1940–2019), former British Ambassador to Argentina and Costa Rica
- William Marsden (orientalist) (1754–1836), the British First Secretaries to the Admiralty. Also an orientalist, linguist and numismatist
- William Marsden (sport shooter) (1860–1942), British Olympic sport shooter
- William Marsden (surgeon) (1796–1867), English surgeon
- William Marsden (footballer, born 1871) (1871–1943), English footballer
- Billy Marsden (1901–1983), English international footballer
- William Milnes Marsden (1873–1956), British solicitor and philatelist
- William Marsden (reporter), author and investigative reporter/assistant city editor for The Gazette (Montreal)
This disambiguation page lists articles about people with the same name.
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