Kymi is a coastal town and a former municipality in the island of Euboea, Greece, named after an ancient Greek town of the same name. Sinc…Kymi is a coastal town and a former municipality in the island of Euboea, Greece, named after an ancient Greek town of the same name. Since the 2011 local government reform it is part of the municipality Kymi-Aliveri, of which it is a municipal unit. The municipal unit has an area of 167.616 km².