| Ancud Volcanic Complex | |
| Type: | Geological complex |
| Period: | Neogene |
| Age: | Oligocene–Miocene |
| Prilithology: | Basaltic andesite |
| Otherlithology: | Dacite |
| Namedfor: | Ancud |
| Region: | Los Lagos Region |
| Coordinates: | -41.9°N -73.8°W |
| Subunits: | Heuihuen, Teguaco, Cocotue |
| Underlies: | Quaternary and Neogene deposits including Lacui Formation |
| Overlies: | Caleta Chonos Formation |
| Extent: | Chiloé Archipelago |
Ancud Volcanic Complex (Spanish; Castilian: Complejo Volcánico de Ancud) is a volcanic complex of Oligocene and Miocene age located around Ancud with exposures in Chiloé Island, the Chilean mainland and smaller islets. Three subunits are recognized in the complex: Hueihuen, Teguaco and Cocotue.[1] The complex is part of the mid-Tertiary coastal magmatic belt in south-central Chile.