Fort Green Mill is a tower mill at Aldeburgh, Suffolk, England which has been converted to residential accommodation.

Fort Green Mill was built in 1824. It was converted into a house in 1902. During the Second World War it was used as a gun emplacement.

It was put up for sale in 2016.

Fort Green Mill is a four-storey tower mill. It had four patent sails and the domed cap was winded by a fantail. It had two pairs of millstones. A photograph of the working mill (above) shows that the sails were double patents carried on a cast-iron windshaft and the fantail had six blades.

There is an inscription in Danish, formerly above one of the doors, now on a wall, "Herren skal bevare din udgang og din indgang". It means "The Lord shall preserve thy going out and thy coming in," from Psalm 121 verse 8.

• Windmill World webpage on Fort Green Mill.