Claiming Polish citizenship via my parents or my sister?

My sister was born in Chicago and both my parents lived there, and married there is there any chance that i can claim citizenship via my parents or via my sister, does anyone know thank you

You have to contact the Urząd Stanu Cywilnego of the city in Poland where your parents resided. Your sister has nothing to do with this. You will need your parents' birth certificates and the US immigration number. They will tell you what is needed.

my father was polish as far as i know i can claim polsih citizenship-my mother english. i remember because of when they were married and when we first went to poland we were told his children are polish citizens