West Toodyay was the original location of the town of Toodyay, Western Australia. It is situated in the Toodyay valley, 85 kilometres (53 mi) north east of Perth. The Toodyay valley, discovered by Ensign Robert Dale in 1831, was opened up for settlement in 1836. The original site for the town of Toodyay was determined in 1836 and its boundaries were finalized 1838. The first survey of the town was carried out in 1849. After several serious floods, the decision was made to move the town of Toodyay to higher ground. In 1860, the new town of Newcastle was established 3 miles (4.8 km) further upstream. Newcastle was renamed in 1910 to Toodyay, and the original site became known as West Toodyay.

Toodyay, known as Newcastle between 1860 and 1910, is a town on the Avon River in the Wheatbelt region of Western Australia, 85 kilometres (53 mi) north-east of Perth. The first European settlement occurred in the area in 1836. After flooding in the 1850s, the townsite was moved to its current location in the 1860s. It is connected by railway and road to Perth. During the 1860s, it was home to bushranger Moondyne Joe.