This section of LocomotivesUK Encyclopedia is dedicated to Steam Locomotives, with the United Kingdom having perfected them and built a significant number of notable ones.
| CoalbrookDale Locomotive | Pen-Y-Darren Locomotive | Puffing Billy | Wylam Dilly |
| The Duke | Locomotion No.1 | Rocket | Invicta |
| GWR Iron Duke | LNER A1 | LNER A2 | LNER A3 |
| LNER A4 | LMS 4MT 2-6-4T | LMS 5MT 4-6-0 | GWR 3700 City Class |
| LNER Steam Locomotives | LMS Steam Locomotives | GWR Steam Locomotives | GER Steam Locomotives |
| GNR Steam Locomotives | LNWR Steam Locomotives | GCR Steam Locomotives | |
