South Leitrim was a parliamentary constituency in Ireland. From 1885 to 1918 it returned one Member of Parliament (MP) to the House of Commons of the United Kingdom of Great Britain and Ireland.
Prior to the 1885 general election and after the dissolution of Parliament in 1918 the area was part of the Leitrim constituency.
This constituency comprised the southern part of County Leitrim.
1885–1918: The baronies of Carrigallen and Mohill, and that part of the barony of Leitrim not contained within the constituency of North Leitrim.
| Election | Member | Party | ||
|---|---|---|---|---|
| 1885 | Luke Hayden | Nationalist | ||
| 1890 | Parnellite Nationalist | |||
| 1892 | Jasper Tully | Anti-Parnellite Nationalist | ||
| 1900 | Nationalist | |||
| 1906 | Thomas Smyth | Nationalist | ||
| 1918 | Constituency abolished: see Leitrim | |||