Samuel Marshall may refer to:

• S.L.A. Marshall (1900–1977), American military historian
• Sam Marshall, fictional character in the Australian TV drama series Home and Away
• Samuel Marshall (1803–1879), founder Marshall & Sons music retailer of Adelaide, South Australia
• Samuel Marshall (Canadian politician) (1757–1813), merchant, shipbuilder and political figure in Nova Scotia
• Samuel R. Marshall, insurance lobbyist in Pennsylvania
• Samuel S. Marshall (1821–1890), American politician, U.S. Representative from Illinois
• Samuel Taylor Marshall (1812–1895), co-founder of the Beta Theta Pi fraternity

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