EAA AirVenture Oshkosh is an annual air show and gathering of aviation enthusiasts held each summer at Wittman Regional Airport and neighbouring Pioneer Airport in Oshkosh, Wisconsin, United States. The southern part of the show grounds, as well as Camp Scholler, are located in the town of Nekimi functioning as the seaplane base on Lake Winnebago is in Black Wolf.

The airshow is arranged by the Experimental Aircraft Association (EAA), an international general aviation organization from Oshkosh, and is the largest in the world of its kind. The show always lasts a week, usually beginning on the Monday of the last full week in July. During the gathering, the airport's control tower, frequency 118.5. During that time, it is the busiest in the world.