Candi Asu, Hindu temple in Sengi, Magelang, Indonesia.

Candi Asu is a small Hindu temple facing west, with a square plan 7.94 metres on each side, a 2.5-metre base and a 3.35-metre body; the roof has collapsed and most of its stones are gone. Its outer wall forms a base while an inner wall acts as the foundation, with two metres of rock and earth packed between them and paved over on top. On the western outer wall a masonry mass was left to form the stairs.

The temple dates to a period of Hindu influence in the region, as confirmed by two stone inscriptions found nearby named Prasasti Sri Manggala I and II from the year 874 CE. These inscriptions document the spiritual importance of the site during that era.

Local people named the temple after the Nandi statue in its grounds: the stone bull, Shiva's mount, looked to them like a dog, and 'asu' is the Javanese word for dog. The name records how the village read the sacred image rather than any official dedication.

Candi Asu stands on the slopes of Mount Merapi, near the meeting of the Pabelan and Telingsing rivers, about 10 km northeast of Candi Ngawen. The road from Mungkid to Boyolali passes close by. Two other Hindu temples, Candi Pendem and Candi Lumbung, lie nearby and can be visited on the same trip.

The builders used an unusual method, working from top to bottom and placing stones at specific angles. The construction appears never to have been fully completed, as larger finishing stones were never put into place.