Yuma, AZ

ZIP code 85366 encompasses the city of Yuma Proving Ground in southwestern Arizona. This area is home to important landmarks such as the U.S. Army Yuma Proving Ground, a military facility for testing weapons and equipment, as well as the Imperial Sand Dunes, a popular destination for recreational activities like off-roading and sand sports. The zip code also includes small residential communities and businesses that support the military base.