| Southern Monmouthshire | |
|---|---|
| Former county constituency for the House of Commons | |
| 1885–1918 | |
| Seats | one |
| Created from | Monmouthshire |
| Replaced by | Bedwellty and Monmouth |
Southern Monmouthshire was a parliamentary constituency in Monmouthshire, Wales. It returned one Member of Parliament (MP) to the House of Commons of the Parliament of the United Kingdom.