The Conmaicne or Conmhaicne were an ancient tribal grouping found scattered around Ireland in the early medieval period. Located in what is now the extreme west of County Galway the Conmhaicne Mara (the Conmhaicne of the sea) gave their name to the territory they occupied i.e. Connemara, which is the anglicised form of Conmhaicne Mara. The territory of Conmhaicne Mara / Connemara covers all of the barony of Ballynahinch and the civil parish of Inishbofin, which is in the barony of Murrisk. The territory contains the five civil parishes of Ballynakill/Baile na Cille, Ballindoon, Moyrus/Maigh Iorras, Omey/Iomaidh Fheicín and Inishbofin/Inis Bó Fine. The territory contains the five Catholic parishes of An Clochán/Clifden (Omey&Ballindoon), Carna (Iorras Ainbhtheach), Roundstone (Cloch na Rón), Baile na Cille/Ballynakill and Inis Bó Fine/Inishbofin.

The collective name for the territory west of the river Corrib was Iar Connacht.

Other branches of the Conmhaicne located in what is now County Galway include the Conmaicne Toland , the Conmaicne Dun Mor . The parish of Kilconickny , which means "church of the Conmaicne"is located west of the town of Loughrea.