| Country: | England |
| Coordinates: | 50.2548°N -5.0791°W |
| Official Name: | Penweathers |
| Shire County: | Cornwall |
| Region: | South West England |
| Postcode District: | TR3 |
| Postcode Area: | TR |
| Os Grid Reference: | SW801438 |
Penweathers is a hamlet in west Cornwall, England, United Kingdom. It is approximately one mile (1.6 km) west of Truro city centre.[1]
The West Cornwall Railway opened the Penwithers railway viaduct on 17 December 1887. Constructed of granite from the quarries at Carn Brea. It consists of seven arches with a total length of . With a uniform width of, it was designed for a possible upgrade to two lines, if needed in the future.[2]