The Marlborough wine region is by far New Zealand's largest, accounting for three quarters of the country's wine production, 70% of its vineyard area and 85% of its wine exports. A Geographical Indication in the north-east of the South Island, it covers the entire Marlborough District and the Kaikōura District of the Canterbury Region, but in practice the vineyards are concentrated around the Blenheim and Seddon townships. Internationally, Marlborough Sauvignon Blanc is recognised as world class; wine writers such as Oz Clarke and George Taber have described it as the best in the world.

Brancott Estate is the brand adopted since 2010 by Pernod Ricard for New Zealand's largest wine producer, formerly Montana Wines, which now operates as the New Zealand division of Pernod Ricard Winemakers. The name comes from its Brancott winery in Blenheim, and was chosen to reduce confusion in the United States market with wines from the state of Montana.