Catharina Belgica of Nassau was a countess of Hanau-Münzenberg by marriage to Philip Louis II, Count of Hanau-Münzenberg. She was regent of Hanau-Münzenberg during the minority of her son from 1612 until 1626.

Philipp Ludwig II of Hanau-Münzenberg, was one of the most notable counts of Hanau of the early modern period, his policies bringing about sweeping changes.