Croglin is the name of a village, former civil parish, beck (stream), and grange now in the parish of Ainstable, in the Westmorland and Furness district, Cumbria, England. Croglin is a quiet picturesque fellside village between the Pennines and the River Eden, about 14 miles (23 km) south-east of Carlisle. The surrounding land is used for agriculture, mainly sheep. A small river, Croglin Water, flows through the valley down into the River Eden. In 1931 the parish had a population of 198.