The K-class was a class of 2-8-4T steam locomotives of the Western Australian Government Railways Between October 1893 and August 1898, the WAGR took delivery of 24 K class locomotives from Neilson & Co.

They entered service on the Eastern Railway between Midland Junction and Northam.

[1] They then mainly operated freight services on the Collie line and within Perth, although they did operate Royal Perth Show and raceday special passenger services.

[2] Six examples originally intended for the WAGR were purchased by the British Government and sent to South Africa to ease a shortage encountered by the Imperial Military Railways resulting from the Boer War, where they became the C class.

It was reused in the 1960s when the K class diesel locomotives entered service.