| Country: | Wales |
| Official Name: | Pen Tranch |
| Os Grid Reference: | SO 272 007 |
| Coordinates: | 51.7008°N -3.0541°W |
| Unitary Wales: | Torfaen |
| Lieutenancy Wales: | Gwent |
| Community Wales: | Pen Tranch |
| Constituency Westminster: | Torfaen |
| Constituency Welsh Assembly: | Torfaen |
| Post Town: | PONTYPOOL |
| Postcode District: | NP4 |
| Postcode Area: | NP |
| Dial Code: | 01495 |
| Area Total Km2: | 12.06 |
| Area Footnotes: | [1] |
| Population: | 5,989 |
| Population Ref: | [2] |
Pen Tranch is a large village and a community in Torfaen, South East Wales.
It lies to the west of Pontypool in the valley leading west to Crumlin. It lies in the historic county of Monmouthshire and the preserved county of Gwent.
The area includes the electoral wards of Pontnewynydd, Snatchwood, and Wainfelin for Torfaen County Borough Council.