Is _____ a State party to the Rome Statute of 1998, founding the ICC?

Is North Korea a State party to the Rome Statute and therefore a member of the ICC?

No, it is not.

(shocking, I know)

Here's a list of the States parties.

Also, North Korea has not submitted to the jurisdiction of the UN's International Court of Justice. (This is the forum where states can sue each other. States have the option to accept or reject the Court's jurisdiction in a particular matter. If a state rejects the Court's jurisdiction, there's nothing anyone can do about it, but it looks bad.)