don't need to go/I don't have to go

[Vladv1]

What is the difference between "I don't need to go there/I don't have to go there" when I mean that it is not necessary for me to go there.

 

[emsr2d2]

What is the difference between "I don't need to go there" and "I don't have to go there" when I mean that it is not necessary for me to go there.

Need = necessity
Have to = obligation

 

[Tarheel]

As always, which one you use depends on context. (See below.)

Abe: You don't need to do it.
Bob: I know I don't need to. I want to.

Abe: Do you have to do it?
Bob: Yes, I gave my word.