The Lugii (or Lugi, Lygii, Ligii, Lugiones, Lygians, Ligians, Lugians, or Lougoi) were a group of tribes mentioned by Roman authors living in ca. 100 BC–300 AD in Central Europe, north of the Sudetes mountains in the basin of upper Oder and Vistula rivers, covering most of modern southern and middle Poland (regions of Silesia, Greater Poland, Mazovia and Lesser Poland).
Most archaeologists identify the Lugians with the Przeworsk culture, which is also associated with the Vandals, and it has been suggested that the Lugians and Vandals may have been closely related or even the same. While this culture was strongly Celtic-influenced in early Roman times, the Lugii are also sometimes regarded as Germanic, like the Vandals.