Location and coordinates are for the approximate centre of Cassop within this administrative area. Geographic features and populated places may cross administrative borders.
Gazetteer of the British Isles (Edinburgh: Bartholomew, 1887). John Bartholomew
Cassop, township, Kelloe par., in co. and 4½ m. SE. of Durham, 1636 ac., pop. 596; P.O. at Cassop Colliery.