Petrus Peckius the Younger, also known as Petrus Pecquius or Pierre Peckius (born Pieter Peck; 1562 – 28 July 1625), was a diplomat and chancellor of Brabant for the Sovereign Archdukes Albert and Isabella. He is best known for a failed attempt to negotiate a renewal of the Twelve Years' Truce in 1621. He was the son of Petrus Peckius the Elder.