Naval Air Station Fallon or NAS Fallon is the United States Navy's premier air-to-air and air-to-ground training facility. It is located southeast of the city of Fallon, east of Reno in western Nevada. Since 1996, it has been home to the U.S. Navy-Fighter Weapons School (TOPGUN) taking over from the former NAS Miramar, California, and the surrounding area contains 240,000 acres (97,000 ha) of bombing and electronic warfare ranges. It is also home to the Naval Aviation Warfighting Development Center (NAWDC), which includes TOPGUN, the Carrier Airborne Early Warning Weapons School (CAEWWS) and the Navy Rotary Wing Weapons School. Navy SEAL Combat Search and Rescue (CSAR) training also takes place there.

Fallon is a city in Churchill County in the U.S. state of Nevada. The population was 9,327 at time of the 2020 census. Fallon is the county seat of Churchill County and is located in the Lahontan Valley. Fallon is known for being home to Naval Air Station Fallon, located southeast of town.