Middlesex is located in Shire Of Manjimup. About 219 people live here (as of 2016). Between 2016 and 2021, the population grew from 219 to 232. Its area extends over around 82.7 square kilometres. Middlesex has around 54 streets. The postal codes are 6258. Middlesex is locality in the Shire of Manjimup, Western Australia.
| Area | 82.7 km² |
| Located in | Western Australia, Shire of Manjimup |
| Postal code | 6258 |
| Country | Australia |
| Population | 219 |
| Cycle path |
| Cycle lane on road |
| Cycling on bus lane |
| Bicycle street |
| Cyclists allowed |
| Cyclists allowed, good surface |
| No cycling |
| Cobblestones |
| Long-distance cycle route | (depending on scale) |
| Long-distance cycle route |
| Long-distance hiking trail | (depending on scale) |
| Long-distance hiking trail |
| No pedestrians |