County Farm Bridge was a covered bridge over the Cocheco River in western Dover, New Hampshire, beside the county farm complex established in 1866. Built about 1875 as the first bridge at that spot, it apparently served the nearby county property, which included the county prison, courthouse, and other public facilities. The single-span Howe truss rested on stone abutments, stretched 112.5 feet, and stood out for its unusually low-pitched roof and vertical board siding. Reinforced in 1963 and transferred from county to city ownership in 1972, it was listed on the National Register of Historic Places in 1975 before fire destroyed it in 1981. A multi-use pedestrian bridge now occupies the crossing.