At the last New Zealand census in 2013, the combined population of the Marlborough and Kaikoura regions was 49,857. The majority of these people are located in the towns of Blenheim, Picton and Kaikoura. Blenheim, which is located on the fertile Wairau Plain, has a population of over 24,000; Picton, at the terminus for the Wellington-Picton ferries, has a population of over 2,500; and the Kaikoura township has a population of 3,555.

Main population centres:  
Blenheim 24,183
Renwick & Woodbourne 2,517
Picton 2,745
Havelock 489
Seddon 507
Kaikoura 3,555

Population mix:  
European 93%
Maori 13%
Pacific Island 1%
Asian & Other 1%

Age mix:
Under 15 20%
15 to 64 64%
65+ 16%

Statistics from Statistics New Zealand
It's a Fact...
SALT FROM THE SEA
Lake Grassmere opens into Clifford Bay near Cape Campbell. Covering an area of 17 square km, it has no natural inflow and is subject to strong warm winds. Close to the sea, it has a very high salinity and is ideal for natural salt extraction. The lake has been divided into solar evaporation ponds. Seawater is pumped in and moved between ponds over several months, each time increasing in salinity. As the salinity increases, crystallised salt forms and is harvested.
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