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How many volcanoes are active in the United States?

The United States has approximately 169 volcanoes that scientists believe to be active. The majority of these are located in Alaska, where eruptions occur almost every year. Others can be found throughout the West and in Hawaii (see our Volcano Activity Map). Kilauea volcano in Hawaii is one of the most active volcanoes on the planet. It's been erupting virtually continuously since 1983."

What is the most active volcano in the United States?

The most famous volcanoes in the United States are undoubtedly Yellowstone in Wyoming and Kilauea in Hawaii. Both volcanoes are not particularly dangerous on their own, but as active volcanoes, they are immensely appealing to tourists. The natural spectacle in Yellowstone National Park is especially appealing because of its well-known geysers.

Hawaii, on the other hand, lies approximately 5,000 kilometers away in the Pacific and was formed by volcanic activity. Kilauea features multiple craters and is one of the world's most active volcanoes, yet it hasn't caused any major damage since 1790.

The bulk of volcanoes are found in the state of Alaska. The Aleutian Islands arch extends from the northern Pacific Ocean to Asia and is located on the Pacific Ring of Fire. The 160 islands were formed by many volcanic explosions.

Which volcanoes in the contiguous United States have erupted since the nation's founding?

Except for steam eruptions, these volcanoes have been active:

Mount St. Helens, Washington: Eruptions and/or lava dome expansion occurred in the late 1700s, 1800-1857, 1980-1986, and 2004-2008.

Lassen Peak, California: On May 30, 1914, a sequence of steam bursts began. An eruption occurred 12 months later, on May 21, 1915. Minor activity continued until the middle of 1917.

Mount Hood, Oregon - After being dormant for almost 1,000 years, Mount Hood began an eruptive episode in 1781 that lasted roughly ten years. In the mid-1800s, locals observed modest explosive activity.

What was the most catastrophic volcanic eruption in US history?

Mount St. Helens (Washington) erupted on May 18, 1980, causing the largest destruction in US history. Novarupta (Katmai) Volcano in Alaska erupted significantly more material in 1912, however due to the region's seclusion and low population, no human casualties occurred, and property damage was minimal. In comparison, the eruption of Mount St. Helens resulted in the loss of lives and significant destruction in a matter of hours.

Which state contains the most active volcanoes?

Alaska has a number of volcanoes. In fact, the Alaska Volcano Observatory reports that Alaska contains the most volcanoes in the United States with the potential to become active. Fortunately, the majority of volcanoes are not located near populated areas, thus they pose no significant threat to human life.

Some of Alaska's more active volcanoes are Bogoslof Island (2017), Mount Augustine (2005), Mount Cleveland (2017), Fourpeaked (2006), Kasatochi Island (2008), and others. However, some of them, like as Mount Cleveland, represent a menace to aircraft flying above the mountain.

Mount Okmok, which is likewise in a remote region, erupted in July 2008, stranding residents in Nikolski, 47 miles distant, for almost three weeks. The same eruption struck Unalaska, causing regular aircraft disruptions.

Top 10 Most Active Volcanoes in the US - 2024 Report
Top 10 Most Active Volcanoes In The US Today

Top 10 in the United States with the most active volcanoes


US State

Number of Active Volcanoes























New Mexico








Where does the United States rank in terms of volcanoes?

The United States has the third-highest number of historically active volcanoes, trailing only Indonesia and Japan. Furthermore, the United States is home to roughly 10% of the more than 1,500 volcanoes that have erupted over the last 10,000 years. The majority of these volcanoes are found in the Aleutian Islands, the Alaska Peninsula, the Hawaiian Islands, and the Cascade Range of the Pacific Northwest.

Top 10 Most Active Volcanoes In The US

1. Yellowstone Caldera, Wyoming

The Yellowstone Caldera has produced major eruptions that may still be seen throughout Wyoming. It is North America's largest volcanic system, with massive eruptions estimated to have occurred approximately 600,000 years ago.

According to geologists, Yellowstone Caldera is a super volcano, which means it has the potential to erupt massively, spilling more than 240 cubic miles of flaming lava. However, according to the NPS, the likelihood of an explosion in 10,000 years is extremely low.

2. Hawaii volcanoes, HI

Top 10 Most Active Volcanoes in the US - 2024 Report

If you know Hawaii as an exotic vacation destination, you surely have heard about Hawaii Volcanoes National Park. The park is home to Kilauea and Mauna Loa volcanoes, which have recently demonstrated activity, with Kīlauea currently showing activity.

Visitors to the park can observe the eruption from a safe distance. The park gives tourists with park guides and materials to help them prepare before going near the eruption sites. If you want to have an unforgettable experience, book a camper or cabin in Hawaii Volcanoes National Park and go hiking across the mountains.

READ MORE: Denali's Amazing Facts - Highest Natural Peak In The US

3. Three Sisters, OR

The USGS refers to Three Sisters as a cluster of glaciated stratovolcanoes. It is located near the Oregon town of Sisters, after which it was named. Do you want to know interesting facts about Three Sisters? It is a compound volcano, with the third, fourth, and fifth highest peaks in Oregon.

Furthermore, each sister's geological makeup is unique, which is a natural wonder. Hikers flock to the area all year because of this intriguing fact. Another interesting fact about this volcano is that the South Sister is widely regarded as an excellent introduction to mountaineering due to its ability to be climbed without the use of technical equipment.

4. Mount Redoubt, Alaska

Did you know Alaska has approximately 130 volcanoes on its borders? Mount Redoubt is considered an active volcano. There were several eruptions between 1989 and 1990.

This caused significant damage to the nearby aviation and commercial transportation industries. If you want to see underground activity, go to Lake Clark National Park and Preserve, which is about 100 miles from Anchorage.

READ MORE: Top 10 Most Beautiful Mountains in the World For Discovering

5. Mount St. Helens, Washington

John Pallister/The United States Geological Survey/Getty Images.

Mount St. Helens was known as the 'Mount Fuji of America' due to its conical shape prior to its historic eruption in 1980. Despite being dormant since 1857, it had an explosive steam eruption on March 27, 1980, triggering an earthquake with a Richter scale of 5.1 and resulting in a massive landslide. The consequences were catastrophic: 57 people were killed, and a 200-plus-square-mile (518-square-kilometer) area of trees was destroyed. The surrounding valleys were also buried in lava flows. Seismic activity has been recorded between 1989 and 1991, as well as 1995 and 1998, but no major eruptions have occurred since.

6. Mount Shasta, California

Mount Shasta, in northern California, is quickly becoming a popular vacation destination, offering excellent hiking, mountaineering, and skiing opportunities. However, it remains an active volcano, with one eruption every 600 to 800 years. It was formed from the remnants of an older volcano around 300,000 to 500,000 years ago, but volcanic gases and hot springs are still emitted from the summit, and the USGS currently rates it as 'Very High' threat.

7. Lassen Peak, California

Top 10 Most Active Volcanoes in the US - 2024 Report

Lassen Peak is among the most active volcanoes in the United States.

Lassen Peak in California had a significant eruption in 1915. The eruption caused ash to fall in a 20-mile radius. Lassen Volcanic National Park has been designated as a site of active volcanic activity for over three million years.

Geologists discovered several fumaroles, bubbling mud pits, and springs throughout the area to provide evidence of this. Even though there have been no recent eruptions at Lassen Peak, geologists predict that one will occur in the future.

8. Mount Hood (OR)

Top 10 Most Active Volcanoes in the US - 2024 Report

Mount Hood in Oregon has been documented to have explosive activity in the last 1500 years, and it still poses a hazard of lava eruptions. This peak of more than 11,000 feet can be climbed year-round. Ascents are usually reported between May and June.

If you want to see the explosion, you can stay at the Historic Timberline Lodge for a while. Alternatively, you can trek the extensive trail that surrounds Mt Hood National Forest.

9. Iliamna volcano, Alaska

Iliamna, a glaciated summit at 10,016 feet (3,053 metres) near the mouth of Cook Inlet, erupted last in 1867. However, there have been reports of vapour, smoke, and even ash erupting from the volcano many times during the twentieth century, the most recent in 1958. The cone-shaped summit is composed of volcanic rocks and lava flows and is encircled by ten glaciers. According to the Alaska Volcano Observatory, the warning level is currently 'Normal'.

10. Long Valley Caldera, California

A tour around the Long Valley Volcanic Center reveals that it is a hotbed of volcanic activity, with wonders ranging from geothermal pools to lava domes and boiling fumaroles (shown). The natural terrain, located east of California's central Sierra Nevada Mountains, arose during a massive eruption some 760,000 years ago. Ongoing action developed features such as the geothermal Hot Creek around 288,000 years ago and Mammoth Mountain between 111,000 and 57,000 years ago. The most recent eruption occurred just 300 years ago, and the area is frequently affected by earthquakes.

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