The LSWR X2 class was a class of express passenger 4-4-0 steam locomotives designed for the London and South Western Railway by William Adams.

Twenty were constructed at Nine Elms Locomotive Works between 1890 and 1892.

Adams had designed his 7-foot-1-inch (2.159 m) drivered locomotives for the London to Bournemouth route, while the 6-foot-7-inch (2.007 m) drivered locomotives were intended for the London to Salisbury route which had more severe gradients.

[1] All passed to the Southern Railway at the grouping in 1923.

This article relating to steam locomotives operated in England is a stub.