Castella is a small town in Victoria Australia. It lies to the east of Kinglake at the intersection of the Melba Highway and the Healesville Kinglake Road. At the 2011 Census, Castella had a population of 344.
The Castella Quarries produces sandstone and crushed rock. One of the quarries was used to dump the drillings from a tunnel under the Toolangi State Forest. This tunnel is part of the Sugarloaf Pipeline, carrying freshwater to Melbourne from the Goulburn River.