Kallieis (Greek: Καλλιείς, full form Δήμος Καλλιέων) is a former municipality in the northern part of Phocis, Greece. Since the 2011 local government reform it is part of the municipality Delphi, of which it is a municipal unit. The municipal unit has an area of 183.256 km2. Its registered population in 2011 amounted to 1,673. The seat of the municipality was Mavrolithari, which is home to about 20% of the municipal unit population.
The municipality is mostly mountainous, with Mount Giona dominating the north, towards the boundary with Phthiotis. Most of the area is forested. Typical vegetation includes pine, fir, cypress and spruce trees; the higher altitudes are mostly barren, while and farmland is limited to the low-lying valleys. Main industries are agriculture and tourism.