| Queensland Railways A12 class | |
| Powertype: | Steam |
| Builder: | Baldwin Locomotive Works |
| Serialnumber: | 4197-4199 |
| Builddate: | 1878 |
| Totalproduction: | 3 |
| Whytetype: | 4-4-0 |
| Fueltype: | Coal |
| Cylindercount: | 2 outside |
| Cylindersize: | 12x |
| Operator: | Queensland Railways |
| Fleetnumbers: | 38, 39, 167 |
| Disposition: | all scrapped |
The Queensland Railways A12 class locomotive was a class of 4-4-0 steam locomotives operated by the Queensland Railways.
In 1878, the Queensland Railways took delivery of three 4-4-0 locomotives built by Baldwin Locomotive Works. Two entered service on the Southern & Western Railway and one on the Central Railway. Per Queensland Railway's classification system they were designated the A12 class, A representing they had two driving axles, and the 12 the cylinder diameter in inches.[1]
| Works number | Central Railways number | Southern & Western Railway number | Queensland Railways number | In service | Notes |
|---|---|---|---|---|---|
| 4197 | 11 | 167 | July 1878 | Condemned June 1913 | |
| 4198 | 38 | 38 | June 1878 | Condemned June 1912 | |
| 4199 | 39 | 39 | July 1878 | Condemned June 1912 | |