[3] The United States Department of Commerce designates the airport and its hangars, warehouses, industrial buildings, and distribution facilities as a Foreign-Trade Zone.

[5] Castle Airport serves as the headquarters for the Sierra Academy of Aeronautics, which specializes in training foreign pilots, primarily from the People's Republic of China.

Among the exhibit highlights are a Lockheed SR-71 Blackbird, the world's fastest crewed aircraft, and the Convair RB-36 Peacemaker, the only surviving reconnaissance variant of the largest bomber ever built for the United States Air Force.

In the year ending May 30, 2019, the airport had 103,363 aircraft operations, an average of 283 per day: 99% general aviation, <1% military, and <1% air taxi.

During the following cleanup efforts, all hazardous and toxic materials that the Air Force was unwilling or unable to transport offsite were sealed into four onsite landfills.

Approximately 6000 people obtain their drinking water from both municipal and private wells located near the site.

In 1994 a Restoration Advisory Board had been established on behalf of the former Castle Air Force Base, and reviewed Federal cleanup methods and efforts.

Rationale for this move was the high cost of living in the Sunnyvale/Mountain View/San Francisco Bay Area for full-time Active Guard and Reserve (AGR) and Air Reserve Technician (ART) personnel assigned to the unit, and the travel time and non-reimbursed expenses cost for "traditional" part-time air national guardsmen serving in the unit, most of whom reside in the San Joaquin Valley region due to lower cost of living.