Angle Tarn is a tarn in Cumbria, England, within the Lake District National Park, about a mile north-east of Hartsop. Located at an altitude of , the lake has an area of , measures , with a maximum depth of . The lake is very distinctive in that it resembles a fish hook in shape. It contains two rocky islets and a small broken peninsula. It is located on the Angletarn Pikes, which are named after it.
This should not be confused with Angle Tarn (Langstrath), a smaller lake with the same name about 18.5 km to the northeast near Bowfell, also within the Lake District National Park.
Angle Tarn is a popular spot for overnight wild camping, especially on weekends and in the summer months. The tarn has been described by Alfred Wainwright as among the best of Lakeland tarns.