Upvote:4
As far as I know (and I am not a lawyer) children of Polish citizens are Polish citizens. It should be enough to have only one parent that is Polish to automatically be Polish, and there is no limit on the number of generations born abroad (as is the case with UK nationality for example). However, there might be some special rules (introduced during communism) that have an impact on your case.
The only thing I could suggest is go to your closes Polish embassy and tell them you would like to apply for a Polish passport, because you claim to have Polish citizenship. They should figure out all the legal details for you and clarify your situation.
EDIT: take a look at http://polish-citizenship.eu