The Slovene March or Slovene krajina (Slovene: Slovenska krajina, Hungarian: Vendvidék, Szlovenszka krajina, Szlovén krajina) was the traditional denomination of the Slovene-speaking areas of the Vas and Zala County in the Kingdom of Hungary from the late 18th century until the Treaty of Trianon in 1919. It comprised approximately two-thirds of modern Prekmurje, Slovenia, and the modern area between the current Slovenian-Hungarian border and the town of Szentgotthárd, where Hungarian Slovenes still live. In Hungarian, the latter area is still known as Vendvidék, which is the Hungarian denomination for the Slovene March, while in Slovene it is referred as Porabje (literally, 'the area along the Rába river').
It should not be confused with the medieval Slovene (or Windic) March of the Holy Roman Empire which was located in the present-day south-east Slovenia, roughly in the areas of the regions of Lower Carniola, White Carniola and Posavje.
March, or "territory" (cognate to "mark"), is a word indicating a border county of a kingdom.
Since the 10th century, the Slovene-inhabited area between the Mura and Rába rivers was part of the Kingdom of Hungary. Most of this area was included in Vas County, while a smaller portion to the southeast (the areas between Lendava and Beltinci) belonged to Zala County. In the 12th century, the bishop of Győr founded a Slovene deanery district in his bishopric, under the name Tótság.