This constituency comprised the eastern part of County Clare. In 1918, it was extended to include a small part of County Galway which had been transferred to Clare in 1898.
1885–1918: The baronies of Burren, Bunratty Lower, Bunratty Upper, Tulla Lower, Tulla Upper, that part of the barony of Inchiquin consisting of the parishes of Dysert, Kilkeedy, Killinaboy, Kilnamona, Rath (excluding the townlands of Carrowvere, Drinagh, Loughnagowan, Martry, Moanreel North and Moanreel South) and Ruan, and that part of the barony of Islands consisting of the parishes of Clare Abbey, Clondagad (excluding the townlands of Dehomad, Furroor and Liscasey), Drumcliff and Killone.
1918–1922: The existing East Clare constituency, together with that part of the South Galway constituency comprised in the administrative county of Clare.