The name Lennon is both a surname and a given name that has grown in popularity in English-speaking countries in recent years for both boys and girls.

Origins include Irish Ó Leannáin ("descendant of Lover (leannán)") and from Ó Lionáin ("descendant of Blackbird (Lonán)").^{[citation needed]}

Notable people and characters with the name include:

• John Lennon (1940–1980), singer, musician, poet and songwriter, founder of The Beatles
  • Cynthia Lennon (1939–2015), John Lennon's first wife (born Cynthia Powell)
  • Julian Lennon (born 1963), John Lennon's first son with Cynthia Powell
  • Sean Lennon (born 1975), John Lennon's second son with Yoko Ono
  • Alfred Lennon and Julia Lennon, parents of John Lennon
• The Lennon Sisters, four siblings who sang together as part of an act, most notably seen on The Lawrence Welk Show
  • Dianne Lennon, American singer
  • Janet Lennon, American singer
  • Kathy Lennon, American singer
  • Peggy Lennon, American singer
• The members of Venice (band):
  • Kipp Lennon (born 1960), American musician
  • Mark Lennon, American musician
  • Michael Lennon, American musician
  • Pat Lennon, American musician
• Aaron Lennon (born 1987), English footballer
• Alton Lennon, Democratic U.S. senator from the state of North Carolina
• Ben Lennon, Australian rules footballer
• Bill Lennon (1845–1910), American baseball player
• Bruce Lennon, Australian rules footballer
• Caroline Lennon, Irish actor
• Dennis Lennon (1918–1991), British architect and interior designer
• Harry Lennon (born 1994), English footballer
• Jimmy Lennon (1913–1992), American boxing ring announcer (Jimmy Lennon Sr or Jr)
• John Lennon (disambiguation), several people
• J. Robert Lennon, American novelist, short story writer, musician and composer
• Joseph Lennon (1933–1990), Irish politician
• Keith Lennon, character from Magical DoReMi
• Mark Lennon (born 1980), Australian rugby player
• Michael Lennon (disambiguation), several people
• Monica Lennon, Scottish politician
• Neil Lennon (born 1971), Northern Irish footballer
• Patrick Lennon (disambiguation), several people
• Paul Lennon (born 1955), Australian politician
• Peter Lennon (1930–2011), Irish journalist and filmmaker
• Richard Lennon (1947–2019), American Roman Catholic bishop
• Robert L. Lennon (1933–2021), American politician
• Stephen Lennon, guitarist in The Questions
• Stephen Yaxley-Lennon (born 1982), British political activist, known as Tommy Robinson
• Steven Lennon (born 1988), Scottish footballer
• Thomas Lennon (disambiguation), several people
• William Lennon (1849–1938), politician in Queensland, Australia

• Lennon (Brazilian footballer)
• Lennon Dobson (born 2006), English professional footballer
• Lennon Gallagher (born 1999), British model and musician and son of Liam Gallagher
• Lennon Greggains (born 1999), Welsh rugby player
• Lennon Lacy (died 2014), American student and alleged murder victim
• Lennon Miller (born 2006), Scottish footballer
• Lennon Murphy (born 1982), American rock singer
• Lennon Parham (born 1975), American actress and comedian
• Lennon Stella (born 1999), Canadian singer and actress
• Lennon Thompson, Canadian soccer player

• Lennon (disambiguation)
• Lenin (disambiguation)