Amersfoort Jazz is an annual open air jazz festival in the Dutch city of Amersfoort. The festival has eight stages all over the old part of the inner city of Amersfoort, mainly on the historic squares. The festival is traditionally held in the second weekend of May, but moved in 2015 to the second weekend of June. It is a large free three-day event, and it attracts over 100,000 visitors every year.