Aymar III de Poitiers

Aymar III de Poitiers, called Aymaret (1226–1277), was count of Valentinois and Diois, son of William II of Poitiers and grandson of Aymar II. His father's 1226 death sparked a guardianship feud between his mother and Aymar II. He ran the county from 1239 but took the comital title only in 1250.

A land exchange with the lords of Pouzin brought conflict with his grandfather in 1239. He repeatedly fought the bishop of Valence over tolls at Crest, joined Louis IX's Eighth Crusade in 1270, and died in 1277 at Rochemaure, succeeded by his son Aymar IV.