Isabella of Angoulême (French: Isabelle d'Angoulême, IPA: [izabɛl dɑ̃ɡulɛm]; c.1188 – 31 May 1246) was queen consort of England as the second wife of King John from 1200 until John's death in 1216. She had five children by the king including his heir, later Henry III. In 1220, Isabella married Hugh X of Lusignan, Count of La Marche, by whom she had another nine children.
Some people claim that Isabella formed a conspiracy against King Louis IX of France in 1241, after being publicly snubbed by his mother, Blanche of Castile for whom she had a deep-seated hatred. In 1244, after the plot had failed, Isabella was accused of attempting to poison the king, and to avoid arrest, sought refuge in Fontevraud Abbey where she died two years later, but none of this can be confirmed.
She was the only daughter and heir of Aymer Taillefer, Count of Angoulême, by Alice of Courtenay, who was sister of Peter II of Courtenay, Latin Emperor of Constantinople and granddaughter of King Louis VI of France.
Isabella became Countess of Angoulême in her own right on 16 June 1202, by which time she was already queen of England.