Hagg Windmill Hagworthingham · Lincolnshire · England

Hagg Windmill stands on Deep Lane at Hagworthingham. It is a tower corn mill built of red brick, partly rendered, and later covered by an aluminium roof. The Historic England Research Records summary gives a construction date of 1810 for cereal milling, while Lincolnshire mill records describe the tower as dating from at least 1816 and possibly earlier.

The mill changed during its working life. In 1816 it had common sails, but by 1853 it had patent sails. From the mid nineteenth century it operated with four pairs of stones, giving it a substantial milling capacity. A working exterior photograph dated 5 October 1929 records the mill during its later active period. It continued until the Second World War and ceased working around 1943.

The mill's wind-powered form was reduced after closure. In 1950 the cap was replaced by a pitched roof and the remaining two sails were removed. By 1974 all the machinery was still recorded inside, although the floors were becoming dangerous, and some items were later removed to Horncastle mill. Hagg Windmill was listed at Grade II on 14 September 1966. The surviving tower now represents a protected but ruinous remnant of Hagworthingham's wind-powered cereal-milling history.