Volcanoes are found in many parts of the world. Most of them though are found around the Pacific Ocean. This part of the world is called the Ring of Fire. The Ring of Fire is a ring of volcanoes that are around the Pacific Ocean. The Hawaiian islands and the Hawaiian volcanoes are closest to the middle of the Ring of Fire. The reason for this is that there are plates crashing into each other, but they do not crash around Hawaii.
This picture is from USGS, and it shows where all the plates
are.