Riwaka is a small settlement in the Tasman District of New Zealand's South Island. It lies beside Tasman Bay / Te Tai-o-Aorere, five kilometres north of Motueka, and close to the mouth of the Riuwaka River. The land where the town is based was a swamp known as Tureauraki. Europeans first settled in Riwaka in May 1842. The Riwaka economy has been based around growing tobacco and hops.

Tasman District is a local government district in the northwest of the South Island of New Zealand. It borders the Canterbury Region, West Coast Region, Marlborough Region and Nelson City. It is administered by the Tasman District Council, a unitary authority, which sits at Richmond, with community boards serving outlying communities in Motueka and Golden Bay / Mohua. The city of Nelson has its own unitary authority separate from Tasman District, and together they comprise a single region in some contexts, but not for local government functions or resource management (planning) functions.