Northern Rivers is the most northeasterly region of the Australian state of New South Wales, located between 590 and 820 kilometres north of the state capital, Sydney, and encompasses the catchments and fertile valleys of the Clarence, Richmond, and Tweed rivers. It extends from Tweed Heads in the north to the southern extent of the Clarence river catchment which lies between Grafton and Coffs Harbour, and includes the main towns of Tweed Heads, Byron Bay, Ballina, Kyogle, Lismore, Casino and Grafton. At its most northern point, the region is 102 kilometres (63 mi) south-southeast of the Queensland capital, Brisbane.

New South Wales is a state on the east coast of Australia. It borders Queensland to the north, Victoria to the south, and South Australia to the west. Its coast borders the Coral and Tasman Seas to the east. The Australian Capital Territory and Jervis Bay Territory are enclaves within the state. New South Wales' state capital is Sydney, which is also Australia's most populous city. In December 2023, the population of New South Wales was over 8.3 million, making it Australia's most populous state. Almost two-thirds of the state's population, 5.3 million, live in the Greater Sydney area.