Carnamah is a town in the Mid West region of Western Australia, about 307 kilometres north of Perth along the Midlands Road. At the 2021 c…Carnamah is a town in the Mid West region of Western Australia, about 307 kilometres north of Perth along the Midlands Road. At the 2021 census, the population of the town was 407. The town was gazetted in 1913, and is named after "Carnamah", a pastoral property established by Duncan Macpherson in this location in the late 1860s. A telegraph station was established here in 1873, and is referred to in 1876 by the explorer Ernest Giles. Giles spells it "Cornamah" in his book, but "Carnamah" on his map. Macpherson's property "Carnamah" derives its name from Carnamah Spring. The name is probably Aboriginal of unknown meaning, or possibly is a Gaelic word meaning "cairn of the cattle" or "cattle rocks".