Alexander Ellis may refer to:
- Alex Ellis (born 1991), Canadian racecar driver
- Alexander John Ellis (1814–1890), English mathematician and philologist
- Boo Ellis (Alexander Ellis, 1936–2010), American professional basketball player
- Alex Ellis (diplomat) (born 1967), British diplomat
- Alex Ellis (American football) (born 1993), American football tight end
- Alexander Ellis III (born 1949), business executive
- Alex Ellis (rugby union) (born 1995) Canadian rugby union player