Maigh Seóla was the territory that included land along the east shore of Lough Corrib in County Galway, Ireland. It was bounded by the Uí Maine vassal kingdom of Soghain. Its rulers up to the 1220s were the Muintir Murchada, who took the surname O'Flaherty. They were based at Loch Cime (later called Lough Hackett) until forced west of Lough Corrib during the de Burgo led English invasion of Connacht in the 13th century. According to the 17th century historian Ruaidhrí Ó Flaithbheartaigh Maigh Seóla was considered part of Iar Connacht prior to the 13th century Anglo-Norman invasion of Connacht. After the de Burgo / Burke family became established in Maigh Seola the territorial term Iar Connacht was only used to denote the territory of the O'Flahertys west of Lough Corrib and Lough Mask.