The County of Saintonge (French pronunciation: [sɛ̃tɔ̃ʒ]), historically spelled Xaintonge and Xainctonge, is a former province of France located on the west central Atlantic coast.

Occupying the frontier between Capetian and Plantagenet-controlled areas during the late Middle Ages, between 1152 and 1451, it was the site of constant struggles between lords torn between their allegiance to Anglo-Aquitaine and those linked to Paris.

However, errors by Henry of Grosmont, 1st Duke of Lancaster and Edward, the Black Prince gradually contributed to weakening English power.

Saintonge was the birthplace of French explorer Jean Allefonsce (or Alfonse) in 1484, and of Samuel de Champlain in 1574.

The distinctive Saintongeais dialect (patouê saintonjhouê, jhabrail) was once spoken throughout Saintonge, as well as in the provinces of Aunis and Angoumois.