Word for "void of people"

I think you are looking for deserted.

Definition of deserted in English:

adjective

1. (Of a place) empty of people:

   • deserted streets

   • The office was completely deserted.

2. left by a person or people who do not intend to return

   synonym abandoned

   • a deserted village

   • deserted wives

References:

• http://www.oxforddictionaries.com/definition/english/deserted
• http://www.oxforddictionaries.com/definition/learner/deserted

Depending on what kind of connotation you are looking to convey, might I suggest Desolate?

des·o·late

adjective ˈdesələt/ 1. (of a place) deserted of people and in a state of bleak and dismal emptiness. "a desolate moor" synonyms: bleak, stark, bare, dismal, grim; More

I like Bookeater's suggestion of "deserted", but if you want an alternative, I'd suggest "vacant", which is defined by Merriam-Webster as "not filled, used, or lived in".