There may be more than one possible jurisdiction for your case. There are several considerations, and can sometimes be tricky. One consideration is that you will have to be able to establish "personal jursidiction" over the Defendant in the case. In family law, this could mean where the Defendant lives, where the grounds for divorce arose, and/or where your child lives. You will also have to consider which county your case could be filed. You may have a choice. It is imperative to get the advice of an attorney, or possibly attorneys in more than one jurisdiction, to make the correct or best choice.