Kilmarnock & Troon Railway

The Kilmarnock and Troon Railway was an Ayrshire mineral railway opened on 6 July 1812 between Kilmarnock and the harbour at Troon, a distance of about 9¾ miles. It was the first railway in Scotland authorised by Act of Parliament and the first to use steam haulage in Scotland, when George Stephenson's Killingworth-built locomotive ran trial trips on the line in 1816 (though regular working remained horse-drawn until rebuilding).

The line was built primarily to convey coal from the Duke of Portland's pits at Kilmarnock to shipping at Troon. It was rebuilt as a conventional standard-gauge railway in 1846 and was absorbed into the Glasgow & South Western Railway in 1899. The route survives today as the Glasgow–Stranraer line via Kilmarnock and Troon.