Crosthwaite Parish Church is a church at Great Crosthwaite on the outskirts of Keswick in Cumbria, England. It is dedicated to St Kentigern and is the Anglican church of the parish of Crosthwaite. Since 1951 it has been a Grade II* listed building. The church has an evangelical tradition.

Keswick is a market town and civil parish in the Cumberland unitary authority area of Cumbria, England. Historically, until 1974, it was part of the county of Cumberland. It lies within the Lake District National Park, Keswick is just north of Derwentwater and is four miles from Bassenthwaite Lake. The parish had a population of 5,243 at the 2011 census.