Caguach or Cahuach is one of the most well-known smaller islands of the Chiloé Archipelago, in the south of Chile, forming part of the commune of Quinchao.

Caguach is to the east of the archipelago, one and a half hours by boat from Achao and four from Chiloé's capital, Castro.

The island is known for its annual ceremony in honour of Jesus of Nazareth, involving a procession with the Cahuach statue of Jesus through the island's esplanade, accompanied by music and dancing.

Since the turn of the 21st century, it has been held on the third Sunday of January,[3] so as to take full advantage of folklore tourism during summer.

The Church of Caguach, at the center of festivities, is one of the 16 Churches of Chiloé that were designated as Chilean National Monuments in 1979 and UNESCO World Heritage Sites on 30 November 2000.