Rooksbury Mill is an old watermill in Andover, Hampshire, England, and a Grade II listed building. The building and its associated structures are privately owned, but the surrounding land is owned by the Test Valley Borough Council and managed as a local nature reserve.Although the present mill building dates from the late 16th or early 17th century, Rooksbury Mill may be one of the eleven mills that, according to the Domesday Book, existed in Andover in 1089.