The Nebbiolo (Italian), or Nebieul (Piedmontese) is one of the most important wine grape varieties of Italy's Piedmont region.

The grape is thought to derive its name from the Piedmontese word nebia which means fog. During harvest, generally in late October, a deep, intense fog sets into the Langhe region, where Nebieul thrives. An alternative (and maybe closer to truth) traditional explanation refers to the white milky veil that forms over the fruits as they reach maturity.

The grape is used to make wines such as Barolo, and Barbaresco. These deeply coloured wines can be massively tannic in youth with intriguing scents of tar and roses. As they age, the wines take on a characteristic brick-orange hue at the rim of the glass and mature to reveal complex aromas and flavours (fruits, flowers and a bit of spices) quite unique and thrilling. These wines often take years to become approachable as they require ageing to tame the tannins from the grapes. As part of a global trend begun in the 1990s, younger producers have sought to make their wines more approachable in their youth.

With limited production, the wines of Barolo and Barbaresco can often fetch large sums of money.