Marlborough, New Zealand New Zealand is an isolated country in the middle of the South Pacific Ocean. The country is composed of two long main islands, called simply the North Island and the South Island. Located on the north end of the South Island lies the marvelous Marlborough region. As a pioneering wine district, Marlborough is probably the most revered wine-producing region in this small country, accounting for 62% of all wine produced in New Zealand. You can think of Marlborough as the quintessential sauvignon blanc territory.