Thornthwaite is a village in the Allerdale district of Cumbria, located about 4 miles north-west of Keswick and half a mile south of Bassenthwaite (lake).The village is within the Civil Parish of Above Derwent. Historically, Thornthwaite was a township and chapelry within the ancient parish of Crosthwaite. St Mary's Church is located a short distance east of the village.
THORNTHWAITE, a chapelry, in the parish of Crosthwaite, union of Cockermouth, Allerdale ward above Derwent, W. division of Cumberland, 4 miles (W.N.W.) from Keswick; containing 187 inhabitants. This village commands romantic views of Bassenthwaite lake and Skiddaw. The manufacture of woollen-cloth is carried on. The living is a perpetual curacy; net income, £59; patron, the Vicar of Crosthwaite. The chapel has been enlarged.