Maine is 89.46% [0].

[0] https://en.wikipedia.org/wiki/Forest_cover_by_state_and_terr...

75% of it is mountains, and not exactly inhabited.

Still behind Finland (73.7%) and Sweden (68.7%) though and Laos (71.6%) as well.

https://en.wikipedia.org/wiki/List_of_countries_by_forest_ar...

Not really for a mountain island. Being near the coast means increased moisture and wind, which hits mountains to make rain. Take a japanese-sized slice off the coast of most countries and you will find lots of forrest. Think the pacific northwest, or the bits of hawaii not covered in lava. Then compare parts of the australian coast with no mountains.

Would not count it as forest, but plantation, if it is heavily managed.