The 1st World Scout Jamboree was held from 30 July 1920 to 8 August 1920 and was hosted by the United Kingdom at Kensington Olympia in London. 8,000 Scouts from 34 nations attended the event, which was hosted in a glass-roofed building covering an area of 6 acres (24,000 m2).

The World Scout Jamboree is a Scouting jamboree of the World Organization of the Scout Movement, typically attended by several tens of thousands of Scouts from around the world, aged 14 to 17. At the jamboree, many scouts swap badges.