Murwillumbah is a town in the Northern Rivers region of New South Wales, Australia, in the Tweed Shire, on the Tweed River. Sitting on the south eastern foothills of the McPherson Range in the Tweed Volcano valley, Murwillumbah is 848 km north-east of Sydney, 13 km south of the Queensland border and 132 km south of Brisbane.

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.