List of largest locomotives List List

| name_ | railway | series | maker | dates | drive | wheel_arrangement | weight | power_ | notes_ |
|---|---|---|---|---|---|---|---|---|---|
| PRR GG1 | Pennsylvania Rail Road (PRR), Penn Central, Conrail, Amtrak & NJ Transit | 4800-4938, 900-929 | Altoona Works, General Electric | 1934–43 | Electric | 2-C+C-2 (4-6-6-4) | 208.9 to 216.4 | 4,629 horsepower (3,452 kW), Tractive Effort: 65,500 lbf | Most scrapped; the prototype and 15 production locomotives preserved in museums |
| Class 461 | Železnice Srbije, Serbia | ŽS461-0/1, ŽS461-2 | Electroputere Craiova, Romania | 1965–91 | Electric | Co`Co` | 120 t | 7,638 horsepower (5,696 kW) | Operational in Romania, Serbia, Montenegro, Bulgaria, Hungary & Macedonia. |
| Allegheny | Chesapeake and Ohio Railway (C&O) & Virginian Railway (VGN) | 1600-1659 (C&O), 900-907 (VGN) | Lima Locomotive Works | 1941–48 | Steam | 2-6-6-6 | 544 t | 7,500 horsepower (5,593 kW) | Two on static display |
| M1 | Chesapeake and Ohio Railway (C&O) | 500-502 | Baldwin Locomotive Works | 1947–50 | Steam Turbine Electric | 2-C1-2-C1-B , (4-8-0-4-8-4) | 428 t | 6,000 horsepower (4,474 kW) | Nicknamed Sacred Cows. Sold back to Baldwin in 1950 and scrapped. |