The constituency elects four deputies (Teachtaí Dála, commonly known as TDs) on the system of proportional representation by means of the single transferable vote (PR-STV).

The constituency runs from Mitchelstown in the north of County Cork, through Fermoy, to Cobh, Midleton and Youghal in the south.

[2] The Electoral (Amendment) Act 2023 defines the constituency as:[3][4] Cobh Rural in the former Rural District of Cork; Aghern, Ballyhooly, Ballynoe, Carrig, Castlecooke, Castle Hyde, Castlelyons, Castletownroche, Coole, Curraglass, Fermoy Rural, Glanworth East, Glanworth West, Gortnaskehy, Gortroe, Kilcor, Kilcummer, Kildinan, Killathy, Kilworth, Knockmourne, Leitrim, Rathcormack, Watergrasshill, in the former Rural District of Fermoy; Ballyclogh, Ballynamona, Buttevant, Caherduggan, Carrig, Clenor, Doneraile, Kilmaclenine, Mallow Rural, Monanimy, Rahan, Shanballymore, Skahanagh, Wallstown, in the former Rural District of Mallow; Ballintemple, Ballycottin, Ballyspillane, Carrigtohill, Castlemartyr, Clonmult, Cloyne, Corkbeg, Dangan, Dungourney, Garryvoe, Ightermurragh, Inch, Lisgoold, Midleton Rural, Mogeely, Rostellan, Templebodan, Templenacarriga, in the former Rural District of Midleton; Ballyarthur, Derryvillane, Farahy, Kildorrery, Kilgullane, Kilphelan, Marshalstown, Mitchelstown, Templemolaga, in the former Rural District of Mitchelstown No.

1; Ballynaglogh, Cobh Rural, Glenville, Knockraha in the former Rural District of Cork; Aghern, Ballyhooly, Ballynoe, Carrig, Castlecooke, Castle Hyde, Castlelyons, Castletownroche, Coole, Curraglass, Fermoy Rural, Glanworth East, Glanworth West, Gortnaskehy, Gortroe, Kilcor, Kilcummer, Kildinan, Killathy, Kilworth, Knockmourne, Leitrim, Rathcormack, Watergrasshill, in the former Rural District of Fermoy; Ballyclogh, Ballynamona, Buttevant, Caherduggan, Carrig, Clenor, Doneraile, Kilmaclenine, Mallow Rural, Monanimy, Rahan, Shanballymore, Skahanagh, Wallstown, in the former Rural District of Mallow; Ballintemple, Ballycottin, Ballyspillane, Carrigtohill, Castlemartyr, Clonmult, Cloyne, Corkbeg, Dangan, Dungourney, Garryvoe, Ightermurragh, Inch, Lisgoold, Midleton Rural, Mogeely, Rostellan, Templebodan, Templenacarriga, in the former Rural District of Midleton; Ballyarthur, Derryvillane, Farahy, Kildorrery, Kilgullane, Kilphelan, Marshalstown, Mitchelstown, Templemolaga, in the former Rural District of Mitchelstown No.

Following the death of Cumann na nGaedheal TD Thomas O'Mahony, a by-election was held on 18 November 1924.