The Archdiocese of Poitiers is a Latin archdiocese of the Catholic Church in France. The archepiscopal see is in the city of Poitiers. The Diocese of Poitiers includes the two Departments of Vienne and Deux-Sèvres. The Concordat of 1802 added to the see besides the ancient Diocese of Poitiers a part of the Diocese of La Rochelle and Saintes.

Poitiers is a city on the River Clain in west-central France. It is a commune and the capital of the Vienne department and the historical centre of Poitou. In 2017 it had a population of 88,291. Its agglomeration has 130,853 inhabitants in 2016 and is the center of an urban area of 261,795 inhabitants. It is a city of art and history, still known as "Ville aux cent clochers".