Renwick is a small town in Marlborough, New Zealand, close to the south bank of the Wairau River.

State Highway 63 runs southwest from Renwick through the Wairau River valley.

[3][4] The town was initially known as "Upper Wairau", and then as "Renwicktown" after an early landowner, Dr. Thomas Renwick.

[5][6] Renwick is located in the centre of Marlborough's grape growing region.

Renwick is defined by Statistics New Zealand as a small urban area and covers 2.32 km2 (0.90 sq mi).