Best in the World may refer to:

• Best in the World, former IFBB professional bodybuilding competition
• ROH Best in the World, an annual professional wrestling event held by Ring of Honor
• Daniel Bryan a former professional wrestler who calls himself the "Best in the World"
• CM Punk, a former professional wrestler who calls himself the "Best in the World"
• Chris Jericho, a professional wrestler who claims himself to be the "Best in the world at what I do"

• John Arpin
• John Arquilla
• John Arrowood
• John Arrowsmith
• John Arrowsmith (cartographer)
• John Arrowsmith (scholar)
• John A. R. Scott
• John Arthur
• John Arthur Andrews
• John Arthur Atwill
• John Arthur Barry
• John Arthur Blaikie
• John Arthur Douglas Bloomfield, 2nd Baron Bloomfield
• John Arthur Eaves
• John Arthur Eaves, Jr.
• John Arthur Ferch
• John Arthur Fowler
• John Arthur Garraty
• John Arthur Godley, 1st Baron Kilbracken
• John Arthur Jarvis
• John Arthur Love
• John Arthur Maguire
• John Arthur (politician)
• John Arthur Ransome Marriott
• John Arthurs