Millers Flat is a small town in inland Otago, in the South Island of New Zealand. It is located on the Clutha River, 17 kilometres south of Roxburgh. Fruit growing is the main industry in the area. Most of the town lies on the north bank of the Clutha; the main road, State Highway 8, passes close by on the river's other bank. The Roxburgh Branch railway used to pass through the town; it was opened to Millers Flat in 1925 and was the terminus for approximately two and a half years, until the section to Roxburgh was opened. The line was closed in 1968, though the town's station platform and some of the railway formation still exist.