Hod Hill is a large hill fort in the Blackmore Vale, 3 miles (5 km) north-west of Blandford Forum, Dorset, England. The fort sits on a 143 m (469 ft) chalk hill of the same name that lies between the adjacent Dorset Downs and Cranborne Chase. The hill fort at Hambledon Hill is just to the north. The name probably comes from Old English "hod", meaning a shelter, though "hod" could also mean "hood", referring to the shape of the hill.

A hillfort is a type of fortified refuge or defended settlement located to exploit a rise in elevation for defensive advantage. They are typical of the late European Bronze Age and Iron Age. Some were used in the post-Roman period. The fortification usually follows the contours of a hill and consists of one or more lines of earthworks or stone ramparts, with stockades or defensive walls, and external ditches. If enemies were approaching, the civilians would spot them from a distance.