Omiroupoli is a former municipality in the central part of on the island of Chios, North Aegean, Greece. Since the 2011 local government reform it is part of the municipality Chios, of which it is a municipal unit. The municipal unit has an area of 155.015 km2. Population 7,045 people. The seat of the municipality was Vrontados, the second largest town on the island. The next largest towns are Lagkáda, Karyaí, and Sykiáda.