Gelli
| |
|---|---|
 Mount Zion Chapel, Gelli | |
  Gelli Location within Rhondda Cynon Taf | |
| OS grid reference | SS977948 |
| Principal area | |
| Preserved county | |
| Country | Wales |
| Sovereign state | United Kingdom |
| Post town | TREORCHY |
| Postcode district | CF41 7 |
| Dialling code | 01443 |
| Police | South Wales |
| Fire | South Wales |
| Ambulance | Welsh |
| UK Parliament | |
| Senedd Cymru – Welsh Parliament | |
Gelli is a village in the Rhondda Fawr valley, in the county borough of Rhondda Cynon Taff, Wales, situated on the southern bank of the Rhondda Fawr River. Gelli is a former coal mining village which is a district of the community of Ystrad.