| FS class 736 | |
| Bgcolor: | 00625A |
| Color: | FFFFFF |
| Powertype: | Steam |
| Buildmodel: | USATC S160 |
| Builddate: | 1942–1945 |
| Uicclass: | 1′D h2 |
| Leadingdiameter: | 2feet |
| Driverdiameter: | 4feet |
| Wheelbase: | 51feet |
| Length: | 61feet, including tender |
| Weightondrivers: | 140000lb |
| Locoweight: | 161000lb |
| Tenderweight: | 115500lb |
| Locotenderweight: | 276500lb |
| Fueltype: | Coal |
| Fuelcap: | 20000lb |
| Watercap: | 24.6sigfig=3NaNsigfig=3 |
| Cylindercount: | Two, outside |
| Cylindersize: | 483x |
| Operator: | Ferrovie dello Stato |
| Fleetnumbers: | 736.001 – 736.243 |
| Disposition: | Two preserved, four others extant, 25 sold to Greece (3 extant), remainder scrapped |
Ferrovie dello Stato (FS; Italian State Railways) Class 736 (Italian: Gruppo 736) was a class of 2-8-0 steam locomotives ex-United States Army Transportation Corps (USATC) 2-8-0 steam locomotives of the S160 Class. There were 243 locomotives in this class, numbered 736.001-243. They were taken to Italy by invading US forces.
They were used on west coast routes working from Rome and Naples, with some later seeing service on the Bologna to Ancona line. Some were transferred to Catania, in Sicily.
In 1959, twenty-five locomotives of this class Nos 736.011/23/40/55/73/90/101/2/126/7/131/5/51/8/60/4/6/78/88/90/9/203/7/9/17 were sold to the Hellenic State Railways (Greek Railways, SEK), to add to their Class Θγ; being renumbered 571–595.