Pieter Roose (1585 or 1586 – 27 February 1673), lord of Froidmont, Han and Jemeppe, was president of the Privy Council from 1632 to 1653, and a key actor in the government of the Habsburg Netherlands for over twenty years.

In 1624, when the customs of the city of Mons were being codified, he was deputized by the Privy Council to safeguard the rights of the prince in the resulting publication.

He effectively became civilian head of government in Brussels, despite the rivalry for preeminence with Ferdinand van Boisschot, chancellor of Brabant.

After Pope Urban VIII condemned Jansen's work Augustinus (1640), Roose opposed publication of the papal bull in the Habsburg Netherlands.

Roose died on 27 February 1673 and was buried in the Blessed Sacrament chapel of the Church of St Gudula, Brussels (now a cathedral) on 14 March.