John FitzAlan (1223-1267), Lord Oswestry, Clun, and Arundel, was an English nobleman. He is sometimes counted as 6th Earl of Arundel, although he was never called earl during his lifetime. He married Maude le Botiller, daughter of Theobald le Botiller and Rhese de Verdon.

He was the son of John Fitzalan, Lord of Oswestry, from whom he inherited a great estate in Shropshire, and Isabel d'Aubigny, daughter of William d'Aubigny, 4th Earl of Arundel. After the death without direct heirs of his mother's brother Hugh d'Aubigny, 5th Earl of Arundel, he inherited a quarter of the earl's estate, including Arundel.

Arundel vacillated in the conflicts between Henry III and the barons. He fought on the king's side at the Battle of Lewes, where he was taken prisoner. On 26 May 1244, he obtained possession of his paternal estates in Shropshire.

John and Maude had a son John Fitzalan, 7th Earl of Arundel.