Reefton is a small town on New Zealand's West Coast region, some 80 km northeast of Greymouth, in the valley of the Inangahua River. State Highway 7 passes through the southern part of the town, and State Highway 69 runs north to connect to State Highway 6. Ahaura is 44 km south-west of Reefton, Inangahua Junction is 34 km to the north, Maruia is 63 km to the east, and the Lewis Pass is 66 km to the south-east.

In 1888 Reefton became the first town in New Zealand and the Southern Hemisphere to receive electricity, and its streets were lit by commercial electricity generated by the Reefton Power Station.

The population was 951 in the 2006 Census, a decrease of 36 from 2001.

Rich veins of gold found in a quartz reef near the town led to its name, and also its former name of Quartzopolis. Gold was first discovered near the town in 1866, although the major discovery was made in 1870. Soon after, the town briefly boasted a population of several thousand. This has dwindled to less than a thousand, but with the opening of an Australian owned goldmine the population is expected to grow by several hundred. Other industries in the town are coal mining, forestry, tourism and angling.