| Country: | Wales |
| Coordinates: | 52.5884°N -3.579°W |
| Official Name: | Talerddig |
| Unitary Wales: | Powys |
| Lieutenancy Wales: | Powys |
| Constituency Westminster: | Montgomeryshire |
| Constituency Welsh Assembly: | Montgomeryshire |
| Post Town: | LLANBRYNMAIR |
| Postcode District: | SY19 |
| Postcode Area: | SY |
| Dial Code: | 01650 |
| Os Grid Reference: | SH930001 |
Talerddig is a village in Powys, mid Wales, located on the main A470 road between Llanbrynmair and Carno. It is part of Llanbrynmair community.
Although the village no longer has a railway station, it is on the route of the 1863 constructed Newtown and Machynlleth Railway. The route passes through Talerddig cutting, a significant civil engineering achievement of the 1860s being 120feet deep and cut through solid rock, and the deepest in the world at the time of its completion in 1862.[1] [2]
There was an accident in the cutting on 18 January 1921, of which several pictures survive. There remains a passing loop today on the single track Cambrian Line where railway station existed until 1965. The passing loop was retained in track rationalisations of the 1970s due to the need to "pin down" the brakes on freight trains over the summit, and now a critical operational node for passing passenger trains.[3]