Medea (Slovene: Medeja; Friulian: Migjea or Migjee; German: Mödan) is a comune (municipality) in the Regional decentralization entity of Gorizia in the Italian region of Friuli-Venezia Giulia, located about 45 kilometres (28 mi) northwest of Trieste and about 15 kilometres (9 mi) west of Gorizia. As of 31 December 2004, it had a population of 918 and an area of 7.3 square kilometres (2.8 sq mi).

The municipality of Medea contains the frazioni (boroughs) Ara Pacis, Monte di Medea, and Sant’Antonio.

Medea borders the following municipalities: Chiopris-Viscone, Cormons, Mariano del Friuli, Romans d'Isonzo, San Vito al Torre.

Demographic evolution