The Meža (Slovene) or Mieß (German; pronounced [miːs] ⓘ) is a river in the Austrian state of Carinthia and in Slovenia, a right tributary of the Drava.

From Črna the river turns northwards and flows between the slopes of the Peca massif and the St. Ursula Mountain to Mežica and Poljana.

In its first part the Meža falls rapidly and is a typical Alpine river with its tributaries from the Kamnik Alps and the Karawanks mountain range.

The Meža Valley (Mežiška dolina or Mießtal) within the southern Karawanks range was part of the Austrian Duchy of Carinthia up to 1919, before it was ceded to the Kingdom of Serbs, Croats and Slovenes according to the Treaty of Saint-Germain-en-Laye.

In 1982 the singer-songwriter Marijan Smode [sl] wrote a song about it titled "Mrtva reka" (The Dead River).