The old Newcastle School is an historic building on Duke Street North in Toodyay, Western Australia. It was the first purpose built school in the new town site of Toodyay, and operated as a school from 1887 to 1954.

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.