Montacute is a small regional area in the Adelaide Hills, South Australia.

[3] 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.

[4] The small town of Montacute Heights is located on top of the ridge between Fifth and Sixth Creeks.

Copper was discovered in the area in 1843 by Thomas Burr, and a mine was soon set up.

One of the mine's financiers, Sir John Baker, named the area after Montacute, Somerset, which was near his birthplace.