Connemara (Irish: Conamara) is a district in the west of Ireland of which the boundaries are not well defined. Some^[who?] define it to be the land contained by Killary Harbour, the Maam Valley, Lough Corrib (as far as Moycullen); a line from there to the sea at Barna, and the Atlantic ocean. Others^[who?] draw the eastern boundary line from Killary Harbour to Kilkieran Bay in the west of County Galway.

The term Connemara is frequently used to describe all of County Galway west of Lough Corrib; some^[who?] argue that this is incorrect. It is also used to describe the Gaeltacht (Irish-speaking areas) of western County Galway; again some^[who?] argue that this too is inaccurate as some of these areas are outside of the traditional boundary of Connemara.^{[citation needed]} Some^[who?] also argue that it is not correct to say that Connemara's eastern boundary ends around Barna just on the outskirts of Galway City or at Maam Cross.^{[citation needed]}

"Connemara" derives from the tribal name Conmacne Mara, which designated a branch of the Conmacne, an early tribal grouping that had a number of branches located in different parts of Connacht. Since this particular branch of the Conmacne lived by the sea, they became known as the Conmacne Mara. (Sea in Irish is muir, genitive mara, hence "of the sea".) The area in the east of what is now Connemara was called Delbhna Tír Dhá Locha.