You have many options:
An atheist.
Atheist.
an atheist
an atheist is a person that does not believe in religeon whatsoever
An Atheist or a Heretic (depending on your point of view)
An atheist, or sometimes a secular humanist.
an atheist is someone who doesn't believe in a god.
They can be classified as either atheist or agnostic.
That mainly depends on if you believe in supreme being(s). If you do, then you are agnostic. If you don't, then you are atheist.
Such a person is called an ATHEIST.
If they don't believe in God then they are called "atheist." But you can't call someone that, unless they call themselves that. People just have different religions, so if they don't believe in the bible, they might have something else they believe in.
Theist is the word you would use, as opposed to atheist. Religious people can be theists as well, but theist is as general as you can get.