According to the United States Geological Survey, the state with the most active volcanoes is Alaska, with over 40 active volcanoes.
Alaska has the highest number of active and potentially active volcanoes in the United States, with over 40 volcanoes located in the state. The most active volcano in Alaska is Mount Redoubt, which has erupted several times in the past few decades. Other notable active volcanoes in Alaska include Mount Spurr, Mount Veniaminof, and Mount Wrangell. Alaska is also home to the largest volcano in the United States, Mount Bona, which is located in the Wrangell Mountains.