simon heinrich sack (27 june 1723 in hecklingen – 2 december 1791 in glogau) was hofrat (privy councilor), justice commissioner and adviser to king frederick ii of prussia. he accumulated considerable wealth in this capacity with which he founded the privy councillor simon heinrich sack family foundation in prussia and which still exists to this day. he was named after his maternal grandfather simon heinrich lucanus, government lawyer in halberstadt.