Coldstream Mill, near Beith in North Ayrshire, Scotland, was an early 19th century meal mill powered by the Dusk Water and Whitestone Burn that was enlarged from an existing much earlier watermill. The mill worked until 1991 and was the last traditional working water mill in Ayrshire and one of the last continuously worked watermills in Scotland. The mill buildings have been converted into a private dwelling and the mill pond has been retained.