The LSWR T6 class was a class of express passenger 4-4-0 steam locomotives designed for the London and South Western Railway by William Adams.

Ten were constructed at Nine Elms Locomotive Works between 1885 and 1886.

The boiler was based on that used in the T3 class, and shared the main dimensions.

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

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