Forestmill (or Forest Mill) is a small hamlet in the county of Clackmannanshire, Scotland. It is situated on the A977 road between Kincardine and Kinross, about 3 miles from the Kincardine end. The Black Devon river runs through it towards the town of Clackmannan. A notable feature on the river within Forestmill is a horseshoe weir. This was built in 1711 by George Sorocold to direct water from the river through a sluice into the mill lade that fed the Gartmorn Dam reservoir. The weir was added to the schedule of British listed monuments in 1972.