The Metauro is a river in the Marche region of central Italy. It rises in the Apennine Mountains and runs east for 110 kilometres (68 mi) or 121 kilometres (75 mi) if the Meta is included as its uppermost reach.

The name of the river in Latin is Metaurus or Mataurus. In Ancient Greek, the name of the river is Métauros, Μέταυρος which stems simply from the union of the two torrents: Meta, running from the Apennine pass Bocca Trabaria, at an elevation of 1,044 metres (3,425 ft), and Auro, flowing from Monte Maggiore, at an elevation of 1,384 metres (4,541 ft).