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Articles about steam locomotives (and locomotive types/classes) built before 1840. Of these, see info-box immediately below for the most well-known individual steam locomotives built before 1830 (listed by year).

v t e Pre-1830 steam locomotives
Road	Cugnot's fardier à vapeur (1769) Murdoch's model steam carriage (1784) Puffing Devil (1801) London Steam Carriage (1803)
Railway	The Coalbrookdale locomotive (1802) The Pen-y-Darren locomotive (1804) The Newcastle locomotive (1805) Catch Me Who Can (1808) Salamanca (1812) Puffing Billy (1813) Steam Horse (1813) Blücher (1814) Wylam Dilly (1815) Steam Elephant (1815) Killingworth Billy (1816) The Duke (1817 or 1818) Locomotion No. 1 (1825) The Royal George (1827) Lancashire Witch (1828) Agenoria (1829) Stourbridge Lion (1829) 1829 Rainhill Trials locomotives Novelty Sans Pareil Rocket Perseverance Invicta (1829)
Designers	Nicolas-Joseph Cugnot Timothy Hackworth William Hedley William Murdoch Matthew Murray John Urpeth Rastrick George Stephenson Robert Stephenson Richard Trevithick
History of steam road vehicles History of rail transport in Great Britain to 1830