Harihareshwara Temple, Hindu temple in Davanagere district, India

Harihareshwara Temple is a Hoysala-style Hindu temple in Harihar, built of soapstone on a staggered square mantapa plan, so its outer wall steps in and out in projections and recesses. Half pillars on the parapet wall carry the overhanging eave, and the open hall's ceiling is carved with lotuses and held up by lathe-turned pillars. The original vimana is gone, replaced in modern times with a brick-and-mortar tower; old Kannada inscriptions and hero stones are kept on the premises.

Harihareshwara Temple was built in c. 1223–1224 CE by Polalva, a commander and minister of the Hoysala king Vira Narasimha II. In 1268 CE Soma, a commander of King Narasimha III, made additions to the temple. The original stone tower over the shrine is gone, replaced in modern times by a brick-and-mortar one.

The temple houses a deity representing the fusion of Vishnu and Shiva, with the right half displaying Shiva's attributes and the left half showing Vishnu's characteristics. Visitors can worship both major gods in a single form at this location.

The site sits along the riverbank with natural surroundings, so visitors should be prepared for uneven or slippery ground in places. The carved details and inscriptions are best viewed in good light, ideally during morning or early afternoon hours.

The legend places the descent of Harihara not at the temple itself but at Kudalur, near the confluence of the Tungabhadra and Haridra rivers. The demon Guha's territory was bounded by Uchchangi Durga in the east, Govinahalu in the south, Mudanur in the west and Airani in the north.