The next World Jamboree in 2019 will be held in the Summit Bechtel Reserve is located in West Virginia, USA.
Visit their site.
Besides the World Jamboree we also have the National Jamboree. The next one will be in 2017 and incidently, in the same place as the World Jamboree in 2019!
The Summit Bechtel Reserve in West Virginia, USA.
The National Jamboree is also organized every four years and is organized by the National Council of the Boy Scouts of America. National jamborees are now traditionally held two years after a World Jamboree. 2010 was a slight aberration in the schedule (which resumes in 2013) due to the 100th anniversary of BSA.