| Static Image Name: | Ysgwyddgwyn Presbyterian Church, Deri - geograph.org.uk - 534292.jpg |
| Static Image Caption: | Ysgwyddgwyn Presbyterian Church |
| Country: | Wales |
| Constituency Welsh Assembly: | Merthyr Tydfil and Rhymney |
| Official Name: | Deri |
| Unitary Wales: | Caerphilly |
| Constituency Westminster: | Blaenau Gwent and Rhymney |
| Post Town: | BARGOED |
| Postcode District: | CF81 |
| Postcode Area: | CF |
| Dial Code: | 01443 |
| Os Grid Reference: | SO112032 |
| Coordinates: | 51.7054°N -3.2676°W |
Deri is a little town in Caerphilly County Borough, Wales. 'Deri' is Welsh for oak trees. Deri along with Pentwyn and Fochriw make up the community of Darran Valley. The village grew around the Industrial Age to serve the collieries of Fochriw, Pencarreg and Groesfaen.[1] It was served by Darran and Deri railway station until its closure.