The National Distribution Union (NDU) was a national trade union in New Zealand. It was formed in 1986 as the Northern Distribution Union by the merger of The Northern Drivers Union, The Northern Stores and Warehouse Union, The Auckland and Gisborne Shop Employee Union, and The Northern Butchers and Grocers Union. A further merging of seven South Island unions led to the renaming to the National Distribution Union, the union's final name before its 2011 amalgamation into First Union New Zealand.