| River Greta | |
| Image Alt: | A three-arch bridge spanning a river, surrounded by trees |
| Subdivision Type1: | Country |
| Subdivision Name1: | United Kingdom |
| Subdivision Type2: | Part |
| Subdivision Name2: | England |
| Subdivision Type3: | County |
| Subdivision Name3: | Lancashire |
| Length: | 22km (14miles)[1] |
| Source1 Location: | Ingleton 54.1552°N -2.4668°W |
| Mouth: | Thurland Castle 54.149°N -2.613°W |
| River System: | River Lune[2] |
The River Greta is a river flowing through Lancashire and North Yorkshire in the north of England.
The river is formed by the confluence of the River Twiss and the River Doe at Ingleton.[3]
From Ingleton, the Greta travels westwards through Burton-in-Lonsdale and, over the border in Lancashire, Cantsfield and Wrayton, passing Thurland Castle, where the Greta flows into the River Lune.[4]