Ermionida is a municipality in the Argolis regional unit, Peloponnese, Greece. The seat of the municipality is the town Kranidi. The municip…Ermionida is a municipality in the Argolis regional unit, Peloponnese, Greece. The seat of the municipality is the town Kranidi. The municipality has an area of 421 km. The province of Ermionida was one of the three provinces of Argolis Prefecture. It was abolished in 2006. Its territory covered the territory of the present Ermionida municipality.