| South Louth | |
|---|---|
| Former county constituency for the House of Commons | |
| 1885–1918 | |
| Seats | 1 |
| Created from | County Louth and Drogheda |
| Replaced by | County Louth |
South Louth was a parliamentary constituency in Ireland, which returned one Member of Parliament (MP) to the House of Commons of the Parliament of the United Kingdom, elected on a system of first-past-the-post, from 1885 to 1918. Prior to the 1885 general election and after the dissolution of Parliament in 1918 the area was part of the Louth constituency.