[3] The ancient Euboean Kyme is mentioned as a harbor town related to the more prominent poleis of Chalkis and Eretria in antiquity.

Some modern authors believe that Kyme never existed as an independent polis in historical times but that it was a mere village dependent on either Chalkis or Eretria.

Kymi has one of the largest man-made ports in the country and serves as a transportation hub for the eastern Aegean Islands and northern Greece.

The city Kymi is considered the greenest of Greece in terms of native vegetation and is second all in clean sand beaches.

There are numerous tourist and sightseeing attractions, such as the house of the noted pathologist and researcher George Papanicolaou, inventor of the Pap smear, the Folklore Museum of Kymi, the Monastery of the Transfiguration, three small Byzantine churches in Oxilithos, the Archaeological Collection and the Archaeological Sites, and a ruined Venetian tower in San handkerchief etc.