The Minho (/ˈmiːn.juː/ MEEN-yoo; Portuguese: [ˈmiɲu]) or Miño (/ˈmiːnjoʊ/ MEEN-yoh; Spanish: [ˈmiɲo] ⓘ; Galician: [ˈmiɲʊ]; Proto-Celtic: *Miniu) is the longest river in the autonomous community of Galicia in Spain, with a length of 340 kilometres (210 mi).

[citation needed] The source of the Minho lies north of Lugo in Galicia, in a place called Pedregal de Irimia.

About 20 kilometres (12 mi) north of Ourense at Os Peares, the Minho, with a discharge of 102 m3/s, receives the waters of its main tributary, the Sil, with 184 m3/s.

The first 64 kilometres (40 mi) cross the plateau of Lugo (Terrachá), a peneplain whose elevation ranges from 450 to 650 metres (1,480 to 2,130 ft) above the sea level.

According to E. Bascuas, "Miño", registered as Minius and Mineus, is a form belonging to the old European hydronymy and derived from the Indo-European root *mei- 'walk, go'.