Andersen Air Force Base (Andersen AFB, AAFB) () is a United States Air Force base located approximately northeast of Yigo near Agafo Gumas in the United States territory of Guam. Along with Naval Base Guam, Andersen AFB was placed under the command of Joint Region Marianas on 1 October 2009. The two bases are about 30 miles apart at opposite ends of the island. Administration offices for Joint Region Marianas are about half-way in between, at Nimitz Hill.