Roscommon–South Leitrim

The constituency was created for the 2007 general election by the Electoral (Amendment) Act 2005,^[1] which gave effect to the 2004 Constituency Commission Report on Dáil Constituencies. It included all of County Roscommon and the southern portion of County Leitrim (the area to the east and south of Lough Allen).^[2] This territory was previously represented through the constituencies of Longford–Roscommon and Sligo–Leitrim, both of which were abolished in 2007.

The Electoral (Amendment) Act 2009 defined the constituency as:

"The county of Roscommon;

and, in the county of Leitrim, the electoral divisions of:

Ballinamore, Cloverhill, Corralla, Drumreilly North, Drumreilly South, Garradice, Greaghglass, Killygar, Newtowngore, Oughteragh, in the former Rural District of Ballinamore;

Annaduff, Carrick-on-Shannon, Drumsna, Gortnagullion, Gowel, in the former Rural District of Carrick-on-Shannon No. 1;

Aghavas, Beihy, Breandrum, Bunny Beg, Carrigallen East, Carrigallen West, Cashel, Castlefore, Cattan, Cloone, Corriga, Drumard, Drumdoo, Drumod, Fenagh, Gortermone, Keeldra, Lisgillock, Mohill, Rinn, Riverstown, Roosky, Rowan, in the former Rural District of Mohill."

It was abolished at the 2016 general election and replaced by the Roscommon–Galway and Sligo–Leitrim constituencies.

Note: The columns in this table are used only for presentational purposes, and no significance should be attached to the order of columns. For details of the order in which seats were won at each election, see the detailed results of that election.

^ *: Outgoing TD

On 22 May 2015, Roscommon–South Leitrim was the only constituency to vote against the marriage equality referendum, with 51.42% voting No.^[7]

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