you'd better believe it Darkskies,
New Jersey has a bunch of metal bands around
Kalopsia,BloodFeast,Fire From The Altar just to name a few.
metal is everywhere,it crosses languages,oceans and continents,even religious ideals,hell there are even blackmetal bands from israel[I think I spelled it right]!
Melechesh,Bishop Of Hexen,Grimoire ar fine examples of israeli blackmetal.

Avatar[Belgium],Ember[U.S.A.], Crimson Midwinter[Finland],malkuth[Brazil],
MedievalDemon,[greece],MoonBlood[Germany],
Obscuration[France],Profanum[Poland],Ragnarok[England], Solstafir[Iceland],SongeD'Enfer,Brazil]Casbah[Japan],
EarthShaker[Japan],E.Z.O.[Japan]Rattler[Estonia]
Vomepotro[Brazil],Fury[Australia],Destroyer666[australia]
,Grinning Ghoul[Holland?],Church Bizarre[Denmark].

this list could go on and on,it's just an incredible amount of metal out there.not even counting local bands that have no music recorded to share.
there was or still is,I don't know,an African blackmetal band called Black Diamond Voodoo I heard of some years ago.
it is out there,ya just have to dig or hook up with a member on a metal site and do some music trading as I have done,you will find some Great music!

R-P