Philip II de Croÿ (1496–1549) was Seigneur de Croÿ, Count of Porcéan and first Duke of Aarschot.
Philip I belonged to the powerful House of Croÿ. He was the eldest son of Henry de Croy, and Charlotte de Châteaubriand.
His grandfather was Philip I of Croy, his uncle William II de Croÿ, chief tutor and First Chamberlain to Charles V, and his younger brother was William III de Croy, Archbishop of Toledo.
Philippe II de Croÿ succeeded to the County of Porcéan upon his father's death in 1514. In 1521 he inherited the titles of his uncle William : amongst others, Duke of Soria and Archi, and Count of Beaumont.
Like his predecessors, he was Governor of Hainault and Senior Knight of the Order of the Golden Fleece, but it is as Charles V's general that he is best remembered.
He fought against the French in the Italian War of 1521–1526, and played an important role in the conquest of Tournai (1521).
On April 1, 1534 Charles V created Philippe ("our cousin", as he styled him) Duke of Aarschot and Grandee of Spain First Class. Earlier, he had become Marquess of Renty and exchanged the lordship of Longwy in Lorraine for that of Havré, which his descendants would develop as a family nest.
His first wife was a distant cousin, Anne de Croÿ (1502–1539), Princess of Chimay, daughter of Charles I de Croÿ and great granddaughter of Jean II de Croÿ, Count of Chimay.
They had six children: