| Trelewis | |
|---|---|
 Relocated Trelewis War Memorial | |
  Trelewis Location within Merthyr Tydfil | |
| Population | 2,029 |
| OS grid reference | ST095975 |
| • Cardiff | 14 mi (23 km) |
| Principal area | |
| Preserved county | |
| Country | Wales |
| Sovereign state | United Kingdom |
| Post town | TREHARRIS |
| Postcode district | CF46 |
| Dialling code | 01443 |
| Police | South Wales |
| Fire | South Wales |
| Ambulance | Welsh |
| UK Parliament | |
| Senedd Cymru – Welsh Parliament | |
Trelewis is a small village in the Taff Bargoed Valley of south-east Wales, currently located in the southern part of Merthyr Tydfil County Borough. It is a former mining village and together with nearby Bedlinog was until 1974 part of the Gelligaer Urban District Council area of the county of Glamorgan. The villages name means 'Lewis Town' and was named after the Lewis family who owned a farm on the area where the village is now built.