| South Westmeath | |
|---|---|
| Former county constituency for the House of Commons | |
| 1885–1918 | |
| Seats | 1 |
| Created from | Athlone and Westmeath |
| Replaced by | Westmeath |
South Westmeath was a constituency in Ireland, returning one Member of Parliament to the United Kingdom House of Commons from 1885 to 1918.
Prior to the 1885 general election and after the dissolution of Parliament in 1918 the area was part of the Westmeath constituency.