Doncaster railway works is a plant located in the town of Doncaster, South Yorkshire, England.
Always referred to as "the Plant", it was established by the Great Northern Railway in 1853, replacing the previous works in Boston and Peterborough. Until 1867 it undertook only repairs and maintenance.
In 1866, Patrick Stirling was appointed as Locomotive Superintendent, and the first of the 875 class was built in 1886. At this time the works also began building new coaches: in 1873 the first sleeping cars; in 1879 the first dining cars in the United Kingdom; and in 1882 the first corridor coaches. In 1891, 99 locomotives, 181 carriages and 1493 wagons were built.
Among the locomotives the works produced were the Stirling Singles, the and the Gresley Pacifics, including the world-famous Flying Scotsman, the first locomotive to achieve 100 mph and also run from London King's Cross to Edinburgh Waverley non-stop; and Mallard which achieved the top speed of 126 mph on 3 July 1938 to become the world's fastest steam locomotive, a record that she still holds to the present day. These have hauled such trains as the 'Flying Scotsman', 'Silver Jubilee', 'Coronation' and the 'Elizabethan''. Doncaster also constructed the carriages for the last of these.