This report summarizes the mineral potential of the Alaska Peninsula and adjacent islands from Kamishak Bay westward to False Pass. Despite sporadic mining, prospecting, and oil drilling since the late 1800's, the area remains essentially unprospected. Geologically, the Alaska Peninsula is an uplifted island arc that has had a long and continuing history of igneous activity. Consequently, the area has a high potential for geothermal energy and sulfur deposits are common. The Alaska Peninsula also has a favorable environment of copper porphyry, copper-molybdenum, and several other types of deposits of metallic minerals. Gold was mined on Unga and Popof Islands and prospects containing gold, silver, copper, lead, zinc, iron, and titanium are reported. The Alaska Peninsula is not considered highly favorable for uranium but has some potential that remains essentially untested.