Samuel, Sam or Sammy Ellis may refer to:

• Sam Ellis (cricketer) (1870/71–1946), English cricketer
• Sam Ellis (footballer) (born 1946), English footballer
• Sam Ellis (runner) (born 1982), British athlete
• J. Sam Ellis, American politician
• Sammy Ellis (1941–2016), American baseball player
• Samuel Ellis (1733–1794), owner of land in New York Harbor after whom Ellis Island is named
• Samuel Ellis (English cricketer) (1851–1930), English cricketer
• Samuel Ellis (New Zealand cricketer) (1889–1949), Auckland (New Zealand) cricketer
• Samuel Burdon Ellis (1787–1865), British Royal Marines officer
• Sam Ellis (songwriter) (born 1987), songwriter and record producer

• Samuel Ellis and Company, British engineering firm