Renwick is a small town in Marlborough, New Zealand, close to the south bank of the Wairau River. It is located on State Highway 6, 12 km west of Blenheim. Havelock is 31 km north. Highway 63 runs southwest from Renwick through the Wairau River valley. The population was 1872 in the 2006 Census, an increase of 84 from 2001.
The town was initially known as "Upper Wairau", and then as "Renwicktown" after an early landowner, Dr Thomas Renwick. Renwick has a variety of shops including a dairy, a supermarket, a baker, a butcher, a hairdresser, a tavern and a bar and brewery. Accommodation is available at Motels, B&Bs and a Backpacker Lodge.