Nimitz Hill Annex is located in the hills above the Asan shoreline, in particular the 1944 Liberation of Guam's Asan Invasion Beach. It is located largely along Guam Highway 6, known as Halsey Drive as it passes through the CDP. It is bounded to the north by the Asan Inland Unit of War in the Pacific National Historical Park, to the northeast by Asan's Maina community in the Fonte River valley, to the west by the adjacent Nimitz Hill CDP across the village boundary in Piti, and to the south by the Fonte River and uninhabited inland highlands.
