Montacute is a small regional area in the Adelaide Hills, South Australia. Montacute is located on Fifth Creek, and the mostly-rural suburb extends from Rostrevor in the west to Lenswood in the east, bounded on the north by Castambul and on the south by Norton Summit and Cherryville. The small town of Montacute Heights is located on top of the ridge between Fifth and Sixth Creeks. Montacute is reached from Adelaide via Montacute Road.