Dirfi (, older form Δίρφυς -
Dirfys) is a mountain in the central part of the island of
Euboea,
Greece. At 1,743 m elevation, it is the highest mountain of Euboea. The Dirfi gave its name to the municipal unit
Dirfys. Its summit is 4 km west of
Stropones, 5 km north of
Steni Dirfyos and 28 km northeast of the city of
Chalcis. There are forests on the lower slopes while most of the mountain is covered with grassland. Dirfi's exceptional beauty and mystique was expressed by Michael Nikoletseas in his book
Dirfyan Elegy.