| Country: | England |
| Official Name: | Geltsdale |
| Civil Parish: | Castle Carrock |
| Coordinates: | 54.876°N -2.671°W |
| Static Image Name: | Geltsdale House - geograph.org.uk - 159066.jpg |
| Static Image Caption: | Geltsdale House |
| Population: | 6 |
| Population Ref: | (2001 census) |
| Unitary England: | Cumberland |
| Lieutenancy England: | Cumbria |
| Region: | North West England |
| Constituency Westminster: | Penrith and The Border |
| Post Town: | BRAMPTON |
| Postcode District: | CA8 |
| Postcode Area: | CA |
| Dial Code: | 01228 |
| Os Grid Reference: | NY569536 |
| Pushpin Map: | United Kingdom City of Carlisle |
| Pushpin Map Caption: | Location in the City of Carlisle district, Cumbria |
Geltsdale is a hamlet and former civil parish, now in the parish of Castle Carrock, in the Cumberland district, in the ceremonial county of Cumbria, England, to the southeast of Castle Carrock village. In 2001 the parish had a population of 6.[1] From 1858 Geltsdale was a civil parish in its own right.[2] On 1 April 2003 the parish was abolished and merged with Castle Carrock.[3] [4] The Geltsdale Reservoir railway ran in the vicinity.
The local landscapes are under several levels of protection. Two of the protected areas cover a large area:
Geltsdale & Glendue Fells Site of Special Scientific Interest has an area of 8,059 ha,[6] and is one of the SSSIs which underlie the SPA.
Geltsdale RSPB reserve is a 5,000 ha nature reserve within the SSSI. It mainly moorland and is managed by the Royal Society for Protection of Birds for upland birds such as black grouse and hen harrier.[7]