The Saintonge War is a feudal dynastic encounter that occurs in 1242 between forces of Louis IX of France and those of Henry III of England.

Saintonge is the region around Saintes in the center-west of France.

The conflict arises because some vassals of Louis are displeased with accession of his brother, Alphonse, as count of Poitou.

The French decisively defeat the English at the Battle of Taillebourg and conclude the struggle at the Siege of Saintes, but because of dynastic sensibilities and the desire to go on a crusade, Louis does not annex Guyenne.