I don't know if I believe in God or not. So what religon would that make me?

I don't think you have a religion because most religions believe in god but I think you call it atheist when you don't have a belief in god not sure hope it helps.

I think it is called atheist, thanks

If you do not know if you believe in God or not, it is being an Agnostic. You not deny the existence of God but you are not that sure of the existence of God.

Agnostics claim either that it is not possible to have absolute or certain knowledge of the existence or nonexistence of God.

If you're looking for an organized religion, try Unitarian Universalism. You will be accepted no matter what your beliefs are.

I don't know if i believe in God or not. so what religon would that make me?
As you do not seem to believe in any god/gods, and do not reject any god/gods, you are neither a theist nor a non-theist. You are therefore an Agnostic.

Agnosticism : not a religion , but a world view. It is often put forth as a middle ground between theism and non-theism.

;)