Situated on the South Branch of the Potomac River, this gristmill was the focal point for New Hampden, a small village laid out in 1858. Probably built around the time of the village's founding, the mill served the needs of local residents until the mid-twentieth century, when it ceased operating. The three-and-a-half-story mill is one of the few surviving mills in Highland County. The simple rectangular building has a fieldstone first story and frame upper stories with double-sash windows. The top gable window is sheltered by a small gabled hood that protected a hoist. Some interior machinery remains, but the overshot waterwheel and shed-roofed platform at the entrance are gone, and only traces of the mill's race are evident.