"In 2015, Hawaii imported 91% of the energy it consumed, mostly as petroleum."
They seem to be working hard on it at least, although I'm surprised that only 20% of the renewable energy production is geothermal. I guess it's just more expensive than solar nowadays.
Most of the population lives on Oahu, which doesn't have any volcanic activity anymore as far as I know. I would be a little curious as the why the Big Island doesn't do geothermal, though. If Hawaii could get cheap geothermal power I don't see why Washington DC would block it, I don't think the power generation companies there are controlled federally but I don't know.
As others have noted, outside of Hawai'i and maybe Maui, the islands aren't active (Haleakala is thought to have a few more eruptions left in it). Most of the people live on Oahu, although pretty much everyone else in Hawaii lives on Hawai'i and Maui. I don't know what the residual heat is on Oahu and the other islands; there might be enough to drive geothermal energy, but it's certainly not a renewable resource in those circumstances.
One thing that people haven't mentioned: geothermal energy relies on groundwater or injected water to extract electricity. Hawaii doesn't have particularly plentiful groundwater reserves; and the rock is generally porous enough that there is some concern for the leaching of toxics into the water supply.
https://www.eia.gov/state/?sid=HI
"In 2015, Hawaii imported 91% of the energy it consumed, mostly as petroleum."
They seem to be working hard on it at least, although I'm surprised that only 20% of the renewable energy production is geothermal. I guess it's just more expensive than solar nowadays.