Commonwealth Engineering
| Remains of the waterboard they used to haul trains over the Duck River | |
| Industry | Engineering | 
|---|---|
| Founded | 1921 | 
| Defunct | 1990 | 
| Fate | Acquired by ABB Transportation | 
| Headquarters | |
| Number of locations | Dandenong Rocklea Bassendean | 
| Products | Railway rolling stock | 
| Parent | Australian National Industries | 
Commonwealth Engineering, often shortened to Com-Eng, later known as Comeng [/ˈkɒmɛndʒ/ KOM-enj], was an Australian engineering company that designed and built railway locomotives, rolling stock and trams.