noun
person from outside the prefecture; non-local
Colloquial term used to refer to someone who is not from the speaker's prefecture. Often carries a slight insider/outsider nuance.
このイベントは県外人でも参加できます。
Even people from outside the prefecture can participate in this event.
彼は県外人だから、地元のことをあまり知らない。
He's from out of the prefecture, so he doesn't know much about the local area.
地元民 means a local person, often used in contrast to 県外人 or other outsiders.
Compound of 県外 (outside the prefecture) + 人 (person).