Lidoriki (Greek: Λιδωρίκι, older form: Λιδωρίκιον) is a village and a former municipality in Phocis, Greece. Since the 2011 local government reform it is part of the municipality Dorida, of which it is the seat and a municipal unit. In 2001 the population was 4,225. Its area is 409.5 km² covering nearly one-fifth of Phocis. Lidoriki is built on the foot of Mount Giona and over the Mornos river. It is the centre of the mountains of Dorida.
Lidoriki is located west of Amfissa, northwest of Itea and east-northeast of Nafpaktos.Lidoriki lis located in the Mornos artificial reservoir, formed by the Mornos Dam, completed in 1974. The reservoir supplies the most of the drinking water used in Athens. Lidoriki is also connected to Amfissa via the largest tunnel in Greece with 16.5 km length. This is not a street tunnel, but an aquaeduct for the water from the Mornos reservoir.