The Sligo, Leitrim and Northern Counties Railway Leitrim Class was a class of five 0-6-4T locomotives built by Beyer, Peacock and Company between 1882 and 1889 for the SLNCR.

In 1879 Beyer, Peacock and Company supplied the South Australian Railways K class, which was built to the Irish gauge and designed to run on lightweight track.

[3][4] Beyer, Peacock delivered the first two of this class Fermanagh and Leitrim, in 1882.

They proved to be reliable and the SL&NCR obtained further examples from Beyer, Peacock: Lurganboy in 1895; Lissadell and Hazelwood in 1899.

[4] "Lissadell" was sold in working order to Hammond Lane Foundry in 1954 and survived until broken up at Manorhamilton in 1957.