| DE20000 | |
| Powertype: | Diesel-electric |
| Builder: | GE Transportation Systems, USA |
| Buildmodel: | GE U18C |
| Builddate: | 1957–1958 |
| Totalproduction: | 5 |
| Uicclass: | Co'Co' |
| Length: | 16.40NaN0 |
| Enginetype: | Cooper Bessemer FVBL 12T |
| Cylindercount: | 12 |
| Poweroutput: | 1320kW |
| Operator: | Turkish State Railways |
| Fleetnumbers: | DE20001 – DE20005 |
TCDD DE20000 were the first diesel-electric locomotive built for operations on Turkish State Railways. Five General Electric U18C units with Cooper Bessemer engines were built in 1957–58. All the locomotives are now retired from service.