Chelsea Sugar Refinery

The Chelsea Sugar Refinery, also known colloquially as "Chelsea" and the "sugar works", is a long-established business and landmark in Birkenhead, New Zealand, located on the northern shore of Auckland's Waitemata Harbour.

The refinery was established in 1884, and remains New Zealand's main source of sugar products (for both home use and for the food and beverage industry). This position remained even after New Zealand's deregulation opened the markets in the 1980s to foreign competition, and products are also exported overseas. The refinery also has one of Auckland's deepwater ports, with handysize ships importing raw sugar from Queensland once every four to five weeks.