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.

The town of Toodyay, Western Australia, was not always known by that name. Initially Toodyay was located in what is now West Toodyay before repeated flooding caused the town centre to migrate to the area around the Newcastle convict depot creating the town of Newcastle. After approximately 50 years of confusion the name of Newcastle was changed to Toodyay and the original Toodyay became known as West Toodyay.