It's difficult to give an exact number of volcanoes in the US because it depends on how you define "volcano." There are different types of volcanic features, and some are more obvious than others.

Here's a breakdown:

* Active Volcanoes: There are 169 active volcanoes in the US, according to the USGS. This includes volcanoes in Alaska, Hawaii, the Pacific Northwest, and California.

* Potentially Active Volcanoes: There are many volcanic areas in the US that have shown signs of activity in the past, but haven't erupted recently. These are considered "potentially active" and would need to be carefully monitored.

* Dormant Volcanoes: Some volcanoes are considered dormant, meaning they have not erupted recently but could potentially erupt again. It's difficult to say how many there are, but they are likely numerous.

* Extinct Volcanoes: Some volcanoes are considered extinct, meaning they are unlikely to erupt again. However, even extinct volcanoes can have significant geological features.

In summary, the US has a significant number of volcanoes, with 169 active volcanoes being the most reliable figure. But there are many other volcanic features that could be considered "volcanoes" depending on your definition.